Studio: harden the profile stats aggregation

Four fixes from review:

- _as_float raised OverflowError on a JSON integer wider than float, so
  one oversized counter returned 500 for the whole panel. It degrades to
  zero now, like every other unreadable field.
- Fork dedup elected one winner per source thread, but fork_chat_thread
  copies a single parent_id branch, so sibling forks of a retry and a
  regeneration hold different rows. Electing per original message keeps
  each branch when the source is deleted.
- create_run claims a resume source before the continuation logs its
  first step, so a continuation that failed early took the source's
  completed steps and tokens with it. Supersession now needs the
  continuation to have reached the source's step.
- Cumulative activity is a running total over the displayed window, but
  a narrow card trims older weeks without rebasing, opening the first
  visible bar at the hidden total and flattening the rest.

studio/backend/main.py

@@ -330,6 +330,7 @@ from hub.utils.download_registry import (
 )
 from routes.settings import router as settings_router
 from routes.prompts import router as prompts_router
+from routes.profile_stats import router as profile_stats_router
 from auth import storage
 from auth.authentication import get_current_subject
 from utils.hardware import (
@@ -1048,6 +1049,7 @@ app.include_router(providers_router, prefix = "/api/providers", tags = ["provide
 app.include_router(settings_router, prefix = "/api/settings", tags = ["settings"])
 app.include_router(mcp_servers_router, prefix = "/api/mcp/servers", tags = ["mcp"])
 app.include_router(prompts_router, prefix = "/api/prompts", tags = ["prompts"])
+app.include_router(profile_stats_router, prefix = "/api/profile", tags = ["profile"])
 app.include_router(datasets_router, prefix = "/api/datasets", tags = ["datasets"])
 app.include_router(data_recipe_router, prefix = "/api/data-recipe", tags = ["data-recipe"])
 app.include_router(llama_router, prefix = "/api/llama", tags = ["llama"])

studio/backend/routes/profile_stats.py

@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
+
+"""
+Usage numbers for the Profile settings tab.
+
+Read-only aggregation over the local studio.db (see
+``storage.profile_stats_db``). Nothing is uploaded.
+"""
+
+import asyncio
+from typing import Any
+
+from fastapi import APIRouter, Depends, Query
+
+from auth.authentication import get_current_subject
+from loggers import get_logger
+from storage.profile_stats_db import (
+    MAX_DAILY_DAYS,
+    MAX_TZ_OFFSET_MINUTES,
+    compute_profile_stats,
+)
+from utils.utils import log_and_http_error
+
+router = APIRouter()
+
+logger = get_logger(__name__)
+
+
+@router.get("/stats")
+async def get_profile_stats(
+    days: int = Query(MAX_DAILY_DAYS, ge = 1, le = MAX_DAILY_DAYS),
+    tz_offset_minutes: int = Query(0, ge = -MAX_TZ_OFFSET_MINUTES, le = MAX_TZ_OFFSET_MINUTES),
+    tz: str = Query("", max_length = 64),
+    current_subject: str = Depends(get_current_subject),
+) -> dict[str, Any]:
+    """Usage stats for the signed-in user's local history.
+
+    Days and hours are bucketed in the caller's timezone so a remote browser
+    does not read the server's calendar. ``tz`` is an IANA name, which carries
+    each date's own daylight-saving offset; ``tz_offset_minutes`` is the
+    ``Date.getTimezoneOffset()`` fallback for hosts with no tzdata.
+    """
+    try:
+        # A cold pass parses every message's metadata JSON: ~90 ms at 10k
+        # messages, ~1.2 s at 260k. Off the event loop so it cannot stall token
+        # streaming when Settings is opened mid-generation.
+        return await asyncio.to_thread(
+            compute_profile_stats,
+            days = days,
+            tz_offset_minutes = tz_offset_minutes,
+            tz_name = tz,
+        )
+    except Exception as exc:
+        raise log_and_http_error(
+            exc, 500, "Failed to compute profile statistics", log = logger
+        ) from exc

studio/backend/storage/profile_stats_db.py

@@ -0,0 +1,656 @@
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
+
+"""
+Profile usage statistics derived from studio.db.
+
+Read-only aggregation over rows the app already writes: chat threads/messages
+(with their per-message ``metadata_json``) and training runs/metrics. Nothing
+is recorded specifically for stats, so the numbers are only as complete as the
+local history.
+
+Token counts live inside each message's metadata blob, so they cannot be summed
+in SQL portably (JSON1 is not guaranteed on every bundled SQLite). Rows are
+streamed once in (thread, time) order and every metric is folded in that single
+pass, then memoised against a (count, max created_at) fingerprint so reopening
+the Profile tab is free until history changes.
+"""
+
+import json
+import threading
+import time
+from datetime import date, datetime, timedelta, timezone
+from zoneinfo import ZoneInfo, ZoneInfoNotFoundError
+from typing import Any, Optional
+
+from loggers import get_logger
+
+from storage.studio_db import get_connection
+
+logger = get_logger(__name__)
+
+# Gaps longer than this end a "sitting at the keyboard" stretch: without the cap
+# a thread reopened a week later would report a week-long chat.
+SESSION_GAP_SECONDS = 30 * 60
+# Cap on the daily activity series handed to the UI (the heatmap draws a year).
+MAX_DAILY_DAYS = 366
+# Widest real UTC offset is 14h; anything beyond that is a bad client value.
+MAX_TZ_OFFSET_MINUTES = 14 * 60
+# Top-N lists returned to the client.
+TOP_MODELS = 8
+RECENT_RUNS = 5
+# Serve a memoised payload for this long even if the fingerprint is unchanged,
+# so a chat that is mid-stream still refreshes reasonably promptly.
+CACHE_TTL_SECONDS = 20.0
+
+_cache_lock = threading.Lock()
+_cache: dict[str, Any] = {"fingerprint": None, "expires_at": 0.0, "payload": None}
+
+
+def _as_float(value: Any) -> Optional[float]:
+    """Coerce JSON numbers defensively; metadata is written by the client.
+
+    json accepts integers of any width, and float() raises OverflowError past
+    ~1e308, so one oversized counter would 500 the whole panel.
+    """
+    if isinstance(value, bool) or value is None:
+        return None
+    if isinstance(value, (int, float)):
+        try:
+            number = float(value)
+        except (OverflowError, ValueError):
+            return None
+        return number if number == number and number not in (float("inf"), float("-inf")) else None
+    return None
+
+
+def _as_int(value: Any) -> int:
+    number = _as_float(value)
+    if number is None or number < 0:
+        return 0
+    return int(number)
+
+
+def _iso(day: date) -> str:
+    return day.isoformat()
+
+
+def _clean_str(value: Any) -> str:
+    return value.strip() if isinstance(value, str) else ""
+
+
+def _resolve_zone(tz_name: str, tz_offset_minutes: int):
+    """The caller's zone, preferring an IANA name over a single offset.
+
+    A fixed offset is only correct for the half of the year the caller happens
+    to be in, so a winter message read during summer lands an hour out and can
+    cross midnight. An IANA name carries each date's own offset. The offset
+    stays as the fallback for callers that send no name, or hosts with no tzdata.
+    """
+    if tz_name:
+        try:
+            return ZoneInfo(tz_name)
+        except (ValueError, ZoneInfoNotFoundError, OSError):
+            logger.debug("unknown timezone %r, falling back to fixed offset", tz_name)
+    return timezone(timedelta(minutes = -tz_offset_minutes))
+
+
+def _local_stamp(created_at_ms: int, zone) -> Optional[datetime]:
+    """Wall-clock time in the caller's timezone, not the server's.
+
+    created_at is a client-supplied integer that SQLite stores unchecked, so a
+    value outside datetime's range is possible. Drop that row rather than let
+    one bad import take down the whole panel.
+    """
+    if created_at_ms <= 0:
+        return None
+    try:
+        return datetime.fromtimestamp(created_at_ms / 1000, tz = zone).replace(tzinfo = None)
+    except (ValueError, OverflowError, OSError):
+        return None
+
+
+def _streaks(days: set[date], today: date) -> dict[str, Any]:
+    """Current and longest run of consecutive active days.
+
+    The current streak survives a day that has not been used yet: a streak that
+    ended yesterday is still "live" until today is over.
+
+    Imported history or a skewed client clock can date rows in the future.
+    Those are dropped up front so they cannot pad the longest streak or be
+    reported as the last active day either.
+    """
+    days = {day for day in days if day <= today}
+    if not days:
+        return {"current": 0, "longest": 0, "lastActiveDay": None}
+
+    ordered = sorted(days)
+    longest = 1
+    running = 1
+    for previous, current in zip(ordered, ordered[1:]):
+        running = running + 1 if current - previous == timedelta(days = 1) else 1
+        longest = max(longest, running)
+
+    last = ordered[-1]
+    current_streak = 0
+    if today - last <= timedelta(days = 1):
+        current_streak = 1
+        cursor = last
+        while cursor - timedelta(days = 1) in days:
+            cursor -= timedelta(days = 1)
+            current_streak += 1
+
+    return {"current": current_streak, "longest": longest, "lastActiveDay": _iso(last)}
+
+
+def _model_label(model_id: str) -> str:
+    """Last path segment of a repo id, e.g. ``unsloth/gpt-oss-20b`` -> ``gpt-oss-20b``."""
+    cleaned = model_id.strip().replace("\\", "/")
+    tail = cleaned.rstrip("/").split("/")[-1]
+    return tail or cleaned
+
+
+class _MessageFold:
+    """Accumulators for the single streaming pass over chat messages."""
+
+    def __init__(self) -> None:
+        self.threads: set[str] = set()
+        self.messages = 0
+        self.user_messages = 0
+        self.assistant_messages = 0
+        self.prompt_tokens = 0
+        self.completion_tokens = 0
+        self.total_tokens = 0
+        self.cached_tokens = 0
+        self.tool_calls = 0
+        self.attachments = 0
+        self.session_seconds = 0.0
+        self.longest_chat: dict[str, Any] = {
+            "threadId": None,
+            "title": None,
+            "seconds": 0.0,
+            "messages": 0,
+        }
+        self.by_day: dict[date, dict[str, Any]] = {}
+        self.models: dict[str, dict[str, Any]] = {}
+        self.speed_samples: list[float] = []
+        self.best_speed = 0.0
+        self.best_speed_model: Optional[str] = None
+        self.response_ms: list[float] = []
+        self.first_token_ms: list[float] = []
+
+    def note_model(self, model_id: str, tokens: int) -> None:
+        entry = self.models.setdefault(
+            model_id, {"id": model_id, "label": _model_label(model_id), "messages": 0, "tokens": 0}
+        )
+        entry["messages"] += 1
+        entry["tokens"] += tokens
+
+    def note_day(self, day: date, tokens: int, thread_id: str) -> None:
+        bucket = self.by_day.setdefault(day, {"tokens": 0, "messages": 0, "threads": set()})
+        bucket["tokens"] += tokens
+        bucket["messages"] += 1
+        bucket["threads"].add(thread_id)
+
+
+def _fork_keepers(conn) -> dict[tuple[str, int, str], str]:
+    """For each original message, the one clone elected to stand in for it.
+
+    A clone is normally ignored because the original is counted instead. Once
+    the original is gone, whether its thread was deleted or just that row was
+    pruned, the clones become the only record. Letting every sibling count them
+    would multiply the usage, so exactly one may.
+
+    Electing per message rather than per fork matters because fork_chat_thread
+    copies one parent_id branch, not the whole thread: sibling forks taken from
+    a retry and a regeneration hold different rows, and a per-fork winner would
+    silently drop whatever only the loser carries.
+    """
+    rows = conn.execute(
+        """
+        SELECT m.thread_id, m.created_at, m.role,
+               t.forked_from_thread_id AS source_id
+        FROM chat_messages m
+        JOIN chat_threads t ON t.id = m.thread_id
+        WHERE t.forked_from_thread_id IS NOT NULL
+          AND m.created_at < t.created_at
+        """
+    )
+
+    best: dict[tuple[str, int, str], str] = {}
+    for row in rows:
+        key = (row["source_id"], _as_int(row["created_at"]), row["role"])
+        thread_id = row["thread_id"]
+        current = best.get(key)
+        # Any stable winner works; lowest id keeps the choice reproducible.
+        if current is None or thread_id < current:
+            best[key] = thread_id
+    return best
+
+
+def _surviving_original_keys(conn) -> set[tuple[str, int, str]]:
+    """Identity of every message still living in a thread that has been forked.
+
+    Clones get fresh ids, so there is nothing to join on. Within one thread the
+    timestamp and role are enough to recognise the row a clone was taken from.
+    """
+    rows = conn.execute(
+        """
+        SELECT m.thread_id, m.created_at, m.role
+        FROM chat_messages m
+        WHERE m.thread_id IN (
+            SELECT DISTINCT forked_from_thread_id FROM chat_threads
+            WHERE forked_from_thread_id IS NOT NULL
+        )
+        """
+    )
+    return {(row["thread_id"], _as_int(row["created_at"]), row["role"]) for row in rows}
+
+
+def _fold_messages(conn, zone) -> _MessageFold:
+    fold = _MessageFold()
+    keepers = _fork_keepers(conn)
+    surviving = _surviving_original_keys(conn)
+    rows = conn.execute(
+        """
+        SELECT m.thread_id, m.role, m.metadata_json, m.attachments_json, m.created_at,
+               t.title, t.model_id, t.model_type, t.pair_id,
+               t.created_at AS thread_created_at, t.forked_from_thread_id
+        FROM chat_messages m
+        LEFT JOIN chat_threads t ON t.id = m.thread_id
+        ORDER BY m.thread_id, m.created_at
+        """
+    )
+
+    current_thread: Optional[str] = None
+    thread_title: Optional[str] = None
+    thread_seconds = 0.0
+    thread_messages = 0
+    previous_created: Optional[int] = None
+
+    def close_thread() -> None:
+        if current_thread is None:
+            return
+        fold.session_seconds += thread_seconds
+        if thread_seconds > fold.longest_chat["seconds"]:
+            fold.longest_chat = {
+                "threadId": current_thread,
+                "title": thread_title,
+                "seconds": thread_seconds,
+                "messages": thread_messages,
+            }
+
+    for row in rows:
+        thread_id = row["thread_id"]
+        created_at = _as_int(row["created_at"])
+        if thread_id != current_thread:
+            close_thread()
+            current_thread = thread_id
+            thread_title = row["title"]
+            thread_seconds = 0.0
+            thread_messages = 0
+            previous_created = None
+
+        # Compare mode stores one thread per pane under a shared pair_id, and
+        # the sidebar shows them as a single conversation. Count them that way
+        # too, or one comparison inflates the chat total and drags the average
+        # tokens per chat down.
+        conversation_id = row["pair_id"] or thread_id
+
+        # A fork is its own visible conversation, so it counts towards the chat
+        # total from the moment it exists, before any new turn is added.
+        fold.threads.add(conversation_id)
+
+        # Forking clones the whole ancestry into the new thread, keeping each
+        # copy's original timestamp. Skip a clone while the row it was taken
+        # from is still there to be counted; once that original is gone, only
+        # the elected fork stands in for it, so nothing is lost or doubled.
+        source_id = row["forked_from_thread_id"]
+        if source_id and created_at < _as_int(row["thread_created_at"]):
+            original = (source_id, created_at, row["role"])
+            if original in surviving or keepers.get(original) != thread_id:
+                continue
+
+        fold.messages += 1
+        thread_messages += 1
+
+        if previous_created is not None:
+            gap = (created_at - previous_created) / 1000
+            if 0 < gap <= SESSION_GAP_SECONDS:
+                thread_seconds += gap
+        previous_created = created_at
+
+        stamp = _local_stamp(created_at, zone)
+        role = row["role"]
+        if role == "user":
+            fold.user_messages += 1
+
+        attachments_json = row["attachments_json"]
+        if attachments_json:
+            try:
+                parsed = json.loads(attachments_json)
+                if isinstance(parsed, list):
+                    fold.attachments += len(parsed)
+            except (json.JSONDecodeError, TypeError):
+                pass
+
+        message_tokens = 0
+        metadata: Any = None
+        if role == "assistant":
+            fold.assistant_messages += 1
+            raw_metadata = row["metadata_json"]
+            if raw_metadata:
+                try:
+                    metadata = json.loads(raw_metadata)
+                except (json.JSONDecodeError, TypeError):
+                    metadata = None
+
+        if isinstance(metadata, dict):
+            usage = metadata.get("contextUsage")
+            timing = metadata.get("timing")
+            usage = usage if isinstance(usage, dict) else {}
+            timing = timing if isinstance(timing, dict) else {}
+
+            prompt_tokens = _as_int(usage.get("promptTokens"))
+            completion_tokens = _as_int(usage.get("completionTokens"))
+            total_tokens = _as_int(usage.get("totalTokens"))
+            if completion_tokens == 0:
+                # Local engines occasionally omit the usage chunk; the adapter's
+                # own token count is the next best estimate.
+                completion_tokens = _as_int(timing.get("tokenCount"))
+            if total_tokens == 0:
+                total_tokens = prompt_tokens + completion_tokens
+
+            fold.prompt_tokens += prompt_tokens
+            fold.completion_tokens += completion_tokens
+            fold.total_tokens += total_tokens
+            fold.cached_tokens += _as_int(usage.get("cachedTokens"))
+            fold.tool_calls += _as_int(timing.get("toolCallCount"))
+            message_tokens = total_tokens
+
+            # responseDetails carries the model that actually answered, which
+            # differs from the requested checkpoint whenever a provider routes
+            # or resolves an alias. contextUsage.modelId is the request, so it
+            # is only the fallback. The thread's model_id is never used: it
+            # tracks the current selection, not the one that ran.
+            details = metadata.get("responseDetails")
+            details = details if isinstance(details, dict) else {}
+            model_id = _clean_str(details.get("responseModelId")) or _clean_str(
+                usage.get("modelId")
+            )
+            if model_id:
+                fold.note_model(model_id, message_tokens)
+
+            speed = _as_float(timing.get("tokensPerSecond"))
+            # llama.cpp reports absurd rates on no-op turns; ignore those.
+            if speed is not None and 0 < speed < 100_000:
+                fold.speed_samples.append(speed)
+                if speed > fold.best_speed:
+                    fold.best_speed = speed
+                    fold.best_speed_model = _model_label(model_id) if model_id else None
+
+            stream_ms = _as_float(timing.get("totalStreamTime"))
+            if stream_ms is not None and stream_ms > 0:
+                fold.response_ms.append(stream_ms)
+            # firstTokenTime is already an elapsed duration, not a timestamp.
+            first_token = _as_float(timing.get("firstTokenTime"))
+            if first_token is not None and first_token > 0:
+                fold.first_token_ms.append(first_token)
+
+        if stamp is not None:
+            fold.note_day(stamp.date(), message_tokens, conversation_id)
+
+    close_thread()
+    return fold
+
+
+def _daily_series(fold: _MessageFold, today: date, days: int) -> list[dict[str, Any]]:
+    """Dense day-by-day series so the heatmap can index straight into it."""
+    start = today - timedelta(days = days - 1)
+    series: list[dict[str, Any]] = []
+    for offset in range(days):
+        day = start + timedelta(days = offset)
+        bucket = fold.by_day.get(day)
+        series.append(
+            {
+                "date": _iso(day),
+                "tokens": int(bucket["tokens"]) if bucket else 0,
+                "messages": int(bucket["messages"]) if bucket else 0,
+                "chats": len(bucket["threads"]) if bucket else 0,
+            }
+        )
+    return series
+
+
+def _superseded(prefix: str = "r.") -> str:
+    """SQL for "a later run resumed from this one, so its counters live there".
+
+    ``prefix`` must qualify the outer row: the EXISTS subquery selects from the
+    same table, so a bare column name would bind to the subquery instead.
+
+    ``create_run``'s resume claim sets ``resume_blocked`` and leaves
+    ``output_dir`` alone. Cancelling clears ``output_dir`` while setting the
+    same flag, so the flag alone cannot tell the two apart.
+
+    ``delete_run`` never clears the flag, so the continuation has to still be
+    there. Otherwise deleting it would strand the source at zero while its row
+    and metrics stay visible in history.
+
+    The continuation also has to have reached the source's step. ``create_run``
+    claims the source the moment a resume starts, but ``final_step`` is only
+    written on the first metric flush, so a continuation that fails before then
+    would take the source's completed work down with it.
+    """
+    return f"""
+        {prefix}resume_blocked = 1
+        AND {prefix}output_dir IS NOT NULL
+        AND EXISTS (
+            SELECT 1 FROM training_runs continuation
+            WHERE continuation.output_dir = {prefix}output_dir
+              AND continuation.started_at > {prefix}started_at
+              AND COALESCE(continuation.final_step, 0)
+                  >= COALESCE({prefix}final_step, 0)
+        )
+    """
+
+
+def _training_stats(conn) -> dict[str, Any]:
+    row = conn.execute(
+        """
+        SELECT COUNT(*) AS runs,
+               SUM(CASE WHEN status = 'completed' THEN 1 ELSE 0 END) AS completed,
+               SUM(COALESCE(duration_seconds, 0)) AS seconds,
+               COUNT(DISTINCT model_name) AS models,
+               COUNT(DISTINCT dataset_name) AS datasets,
+               MIN(final_loss) AS best_loss
+        FROM training_runs
+        """
+    ).fetchone()
+
+    # A resumed run continues its source's step and token counters from the
+    # checkpoint, so both absolute totals already include the source's work.
+    # Only a run superseded by a resume is dropped: create_run's claim sets
+    # resume_blocked while leaving output_dir intact, whereas cancelling clears
+    # output_dir, so a cancelled run keeps contributing the work it did do.
+    steps = conn.execute(
+        f"SELECT COALESCE(SUM(r.final_step), 0) FROM training_runs r WHERE NOT ({_superseded()})"
+    ).fetchone()[0]
+
+    # num_tokens is state.num_input_tokens_seen, a running total logged at each
+    # step, so summing the samples multiplies the real figure. Take each run's
+    # final counter, the same value get_run_metrics reports.
+    tokens = conn.execute(
+        f"""
+        SELECT COALESCE(SUM(run_tokens), 0) FROM (
+            SELECT MAX(m.num_tokens) AS run_tokens
+            FROM training_metrics m
+            JOIN training_runs r ON r.id = m.run_id
+            WHERE NOT ({_superseded("r.")})
+            GROUP BY m.run_id
+        )
+        """
+    ).fetchone()[0]
+
+    recent = conn.execute(
+        """
+        SELECT id, display_name, model_name, dataset_name,
+               status, final_loss, final_step, duration_seconds, started_at
+        FROM training_runs
+        ORDER BY started_at DESC
+        LIMIT ?
+        """,
+        (RECENT_RUNS,),
+    ).fetchall()
+
+    return {
+        "runs": _as_int(row["runs"]),
+        "completed": _as_int(row["completed"]),
+        "steps": _as_int(steps),
+        "tokens": _as_int(tokens),
+        "seconds": _as_float(row["seconds"]) or 0.0,
+        "models": _as_int(row["models"]),
+        "datasets": _as_int(row["datasets"]),
+        "bestLoss": _as_float(row["best_loss"]),
+        "recent": [
+            {
+                "id": item["id"],
+                # A renamed run keeps the name the user gave it; otherwise fall
+                # back to the short model label rather than the full repo id.
+                "name": _clean_str(item["display_name"]) or _model_label(item["model_name"] or ""),
+                "modelLabel": _model_label(item["model_name"] or ""),
+                "datasetLabel": _model_label(item["dataset_name"] or ""),
+                "status": item["status"],
+                "finalLoss": _as_float(item["final_loss"]),
+                "steps": _as_int(item["final_step"]),
+                "seconds": _as_float(item["duration_seconds"]) or 0.0,
+                "startedAt": item["started_at"],
+            }
+            for item in recent
+        ],
+    }
+
+
+def _fingerprint(conn) -> tuple:
+    message_row = conn.execute(
+        "SELECT COUNT(*), COALESCE(MAX(created_at), 0) FROM chat_messages"
+    ).fetchone()
+    run_row = conn.execute(
+        "SELECT COUNT(*), COALESCE(MAX(started_at), '') FROM training_runs"
+    ).fetchone()
+    return (message_row[0], message_row[1], run_row[0], run_row[1])
+
+
+def compute_profile_stats(
+    days: int = MAX_DAILY_DAYS,
+    tz_offset_minutes: int = 0,
+    tz_name: str = "",
+) -> dict[str, Any]:
+    """Aggregate every profile statistic in one pass, memoised per history state."""
+    days = max(1, min(int(days), MAX_DAILY_DAYS))
+    tz_offset_minutes = max(
+        -MAX_TZ_OFFSET_MINUTES, min(int(tz_offset_minutes), MAX_TZ_OFFSET_MINUTES)
+    )
+    zone = _resolve_zone(tz_name, tz_offset_minutes)
+    conn = get_connection()
+    try:
+        fingerprint = (_fingerprint(conn), days, tz_offset_minutes, tz_name)
+        now = time.monotonic()
+        with _cache_lock:
+            if (
+                _cache["payload"] is not None
+                and _cache["fingerprint"] == fingerprint
+                and _cache["expires_at"] > now
+            ):
+                return _cache["payload"]
+
+        started = time.perf_counter()
+        fold = _fold_messages(conn, zone)
+        training = _training_stats(conn)
+
+        # "Today" has to match the buckets above, or the newest column and the
+        # current streak drift by a day whenever the caller is elsewhere.
+        today = (_local_stamp(int(time.time() * 1000), zone) or datetime.now()).date()
+        streak = _streaks(set(fold.by_day.keys()), today)
+        daily = _daily_series(fold, today, days)
+
+        peak_day = max(fold.by_day.items(), key = lambda item: item[1]["tokens"], default = None)
+        models = sorted(
+            fold.models.values(), key = lambda item: (item["tokens"], item["messages"]), reverse = True
+        )[:TOP_MODELS]
+
+        speed_samples = fold.speed_samples
+        payload = {
+            "generatedAt": int(time.time() * 1000),
+            "days": days,
+            "totals": {
+                "threads": len(fold.threads),
+                "messages": fold.messages,
+                "userMessages": fold.user_messages,
+                "assistantMessages": fold.assistant_messages,
+                "promptTokens": fold.prompt_tokens,
+                "completionTokens": fold.completion_tokens,
+                "totalTokens": fold.total_tokens,
+                "cachedTokens": fold.cached_tokens,
+                "toolCalls": fold.tool_calls,
+                "attachments": fold.attachments,
+                "activeDays": len(fold.by_day),
+                "chatSeconds": round(fold.session_seconds),
+            },
+            "streak": streak,
+            "peakDay": (
+                {"date": _iso(peak_day[0]), "tokens": int(peak_day[1]["tokens"])}
+                if peak_day and peak_day[1]["tokens"] > 0
+                else None
+            ),
+            "longestChat": (
+                {
+                    "threadId": fold.longest_chat["threadId"],
+                    "title": fold.longest_chat["title"],
+                    "seconds": round(fold.longest_chat["seconds"]),
+                    "messages": fold.longest_chat["messages"],
+                }
+                if fold.longest_chat["seconds"] > 0
+                else None
+            ),
+            "daily": daily,
+            "models": models,
+            "speed": {
+                "averageTokensPerSecond": (
+                    sum(speed_samples) / len(speed_samples) if speed_samples else None
+                ),
+                "bestTokensPerSecond": fold.best_speed or None,
+                "bestTokensPerSecondModel": fold.best_speed_model,
+                "averageResponseMs": (
+                    sum(fold.response_ms) / len(fold.response_ms) if fold.response_ms else None
+                ),
+                "averageFirstTokenMs": (
+                    sum(fold.first_token_ms) / len(fold.first_token_ms)
+                    if fold.first_token_ms
+                    else None
+                ),
+                "samples": len(speed_samples),
+            },
+            "training": training,
+        }
+
+        logger.debug(
+            "profile stats computed in %.1f ms (%d messages)",
+            (time.perf_counter() - started) * 1000,
+            fold.messages,
+        )
+
+        with _cache_lock:
+            _cache["fingerprint"] = fingerprint
+            _cache["expires_at"] = time.monotonic() + CACHE_TTL_SECONDS
+            _cache["payload"] = payload
+        return payload
+    finally:
+        conn.close()
+
+
+def invalidate_profile_stats_cache() -> None:
+    """Drop the memoised payload (used by tests and after history wipes)."""
+    with _cache_lock:
+        _cache["fingerprint"] = None
+        _cache["expires_at"] = 0.0
+        _cache["payload"] = None

studio/frontend/src/features/profile/api/profile-stats.ts

@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+// Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
+
+import { authFetch } from "@/features/auth";
+import { readFastApiError } from "@/lib/format-fastapi-error";
+
+/** One day of the activity series. Dense: every day in range is present. */
+export type ProfileStatsDay = {
+  date: string;
+  tokens: number;
+  messages: number;
+  chats: number;
+};
+
+export type ProfileStatsModel = {
+  id: string;
+  label: string;
+  messages: number;
+  tokens: number;
+};
+
+export type ProfileStatsRun = {
+  id: string;
+  name: string;
+  modelLabel: string;
+  datasetLabel: string;
+  status: string;
+  finalLoss: number | null;
+  steps: number;
+  seconds: number;
+  startedAt: string | null;
+};
+
+export type ProfileStats = {
+  generatedAt: number;
+  days: number;
+  totals: {
+    threads: number;
+    messages: number;
+    userMessages: number;
+    assistantMessages: number;
+    promptTokens: number;
+    completionTokens: number;
+    totalTokens: number;
+    cachedTokens: number;
+    toolCalls: number;
+    attachments: number;
+    activeDays: number;
+    chatSeconds: number;
+  };
+  streak: {
+    current: number;
+    longest: number;
+    lastActiveDay: string | null;
+  };
+  peakDay: { date: string; tokens: number } | null;
+  longestChat: {
+    threadId: string | null;
+    title: string | null;
+    seconds: number;
+    messages: number;
+  } | null;
+  daily: ProfileStatsDay[];
+  models: ProfileStatsModel[];
+  speed: {
+    averageTokensPerSecond: number | null;
+    bestTokensPerSecond: number | null;
+    bestTokensPerSecondModel: string | null;
+    averageResponseMs: number | null;
+    averageFirstTokenMs: number | null;
+    samples: number;
+  };
+  training: {
+    runs: number;
+    completed: number;
+    steps: number;
+    tokens: number;
+    seconds: number;
+    models: number;
+    datasets: number;
+    bestLoss: number | null;
+    recent: ProfileStatsRun[];
+  };
+};
+
+export async function loadProfileStats(
+  signal?: AbortSignal,
+): Promise<ProfileStats> {
+  // Bucket days and hours in this browser's timezone, which is not the
+  // server's when Studio is reached over the network. The IANA name is what
+  // gives each historical date its own daylight-saving offset; the current
+  // offset only covers callers whose host cannot resolve the name.
+  const query = new URLSearchParams({
+    tz_offset_minutes: String(new Date().getTimezoneOffset()),
+    tz: Intl.DateTimeFormat().resolvedOptions().timeZone ?? "",
+  });
+  const res = await authFetch(`/api/profile/stats?${query}`, { signal });
+  if (!res.ok) {
+    throw new Error(await readFastApiError(res, "Failed to load your stats"));
+  }
+  return (await res.json()) as ProfileStats;
+}

studio/frontend/src/features/profile/components/profile-personalization-panel.tsx

@@ -5,14 +5,23 @@ import { publicAssetUrl } from "@/components/mascot-img";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
-import { Switch } from "@/components/ui/switch";
+import {
+  Popover,
+  PopoverContent,
+  PopoverTrigger,
+} from "@/components/ui/popover";
 import { getAuthToken } from "@/features/auth";
 import { cn } from "@/lib/utils";
 import { useT } from "@/i18n";
 import { toastError, toastSuccess } from "@/shared/toast";
-import { Edit03Icon } from "@hugeicons/core-free-icons";
+import {
+  Delete02Icon,
+  Edit03Icon,
+  Image01Icon,
+  Upload01Icon,
+} from "@hugeicons/core-free-icons";
 import { HugeiconsIcon } from "@hugeicons/react";
-import { useEffect, useMemo, useRef, useState } from "react";
+import { useEffect, useRef, useState } from "react";
 import { SLOTH_AVATARS } from "../sloth-avatars";
 import { decodeJwtSubject } from "../utils/jwt-subject";
 import { resizeImageFileToDataUrl } from "../utils/resize-image-file";
@@ -23,6 +32,8 @@ import {
 import { UserAvatar } from "./user-avatar";
 
 const PROFILE_STORAGE_KEY = "unsloth_user_profile";
+const SLOTH_NAME = /^large\s+/i;
+const PNG_SUFFIX = /\.png$/i;
 
 function readPersistedProfile(): {
   displayName: string;
@@ -36,7 +47,8 @@ function readPersistedProfile(): {
     if (!parsed || typeof parsed !== "object") return null;
 
     // Zustand persist shape: { state: {...}, version }
-    const maybeState = "state" in parsed ? (parsed as { state?: unknown }).state : parsed;
+    const maybeState =
+      "state" in parsed ? (parsed as { state?: unknown }).state : parsed;
     if (!maybeState || typeof maybeState !== "object") return null;
     const state = maybeState as {
       displayName?: unknown;
@@ -45,9 +57,11 @@ function readPersistedProfile(): {
     };
 
     return {
-      displayName: typeof state.displayName === "string" ? state.displayName : "",
+      displayName:
+        typeof state.displayName === "string" ? state.displayName : "",
       nickname: typeof state.nickname === "string" ? state.nickname : "",
-      avatarDataUrl: typeof state.avatarDataUrl === "string" ? state.avatarDataUrl : null,
+      avatarDataUrl:
+        typeof state.avatarDataUrl === "string" ? state.avatarDataUrl : null,
     };
   } catch {
     return null;
@@ -64,28 +78,17 @@ export function ProfilePersonalizationPanel() {
   const setAvatarDataUrl = useUserProfileStore((s) => s.setAvatarDataUrl);
   const avatarShape = useUserProfileStore((s) => s.avatarShape);
   const setAvatarShape = useUserProfileStore((s) => s.setAvatarShape);
-  const showGreetingSloth = useUserProfileStore((s) => s.showGreetingSloth);
-  const setShowGreetingSloth = useUserProfileStore(
-    (s) => s.setShowGreetingSloth,
-  );
 
   const [imageError, setImageError] = useState<string | null>(null);
   const [draftName, setDraftName] = useState(displayName);
   const [draftNickname, setDraftNickname] = useState(nickname);
+  const [pickerOpen, setPickerOpen] = useState(false);
   const fileInputRef = useRef<HTMLInputElement>(null);
   const lastDisplayNameRef = useRef(displayName);
   const lastNicknameRef = useRef(nickname);
 
   const sessionSub = decodeJwtSubject(getAuthToken()) ?? "";
   const previewName = draftName.trim() || sessionSub || "Unsloth";
-  const hasNameChanges = useMemo(
-    () => draftName.trim() !== displayName.trim(),
-    [draftName, displayName],
-  );
-  const hasNicknameChanges = useMemo(
-    () => draftNickname.trim() !== nickname.trim(),
-    [draftNickname, nickname],
-  );
 
   useEffect(() => {
     const previous = lastDisplayNameRef.current;
@@ -99,6 +102,8 @@ export function ProfilePersonalizationPanel() {
     setDraftNickname((draft) => (draft === previous ? nickname : draft));
   }, [nickname]);
 
+  // Committed on blur and on Enter rather than behind a Save button, so each
+  // field is a single row like the rest of Settings.
   const saveName = () => {
     const trimmed = draftName.trim();
     if (trimmed !== draftName) setDraftName(trimmed);
@@ -133,6 +138,18 @@ export function ProfilePersonalizationPanel() {
     }
   };
 
+  // Escape, or any programmatic close, unmounts the tab without dispatching a
+  // blur, which would drop whatever was typed. Commit the drafts on the way
+  // out; both saves no-op on an unchanged value, so a double commit is safe.
+  const flushDrafts = useRef<() => void>(() => {});
+  useEffect(() => {
+    flushDrafts.current = () => {
+      saveName();
+      saveNickname();
+    };
+  });
+  useEffect(() => () => flushDrafts.current(), []);
+
   const applyAvatar = (value: string | null) => {
     setAvatarDataUrl(value);
     const persisted = readPersistedProfile();
@@ -180,201 +197,232 @@ export function ProfilePersonalizationPanel() {
     requestAnimationFrame(() => applyAvatar(value));
   };
 
-  const pickSloth = (path: string) => {
-    pickAvatarValue(publicAssetUrl(path));
-  };
-
   return (
-    <div className="mx-auto flex w-full max-w-[640px] flex-col items-center gap-6 rounded-2xl border border-border/70 bg-muted/10 px-8 py-7">
-      <div className="relative">
-        <UserAvatar
-          name={previewName}
-          imageUrl={shownAvatar}
-          size="lg"
-          className="size-[124px] text-[calc(3.15rem*var(--ui-font-scale,1))]"
-        />
-        <input
-          ref={fileInputRef}
-          type="file"
-          accept="image/jpeg,image/png,image/webp,image/gif"
-          className="sr-only"
-          onChange={(e) => {
-            void onPickFile(e.target.files?.[0]);
-            e.target.value = "";
-          }}
-        />
-        <button
-          type="button"
-          onClick={() => fileInputRef.current?.click()}
-          className="absolute right-0 bottom-0 -translate-x-[15.625%] -translate-y-[15.625%] flex size-8 items-center justify-center rounded-full border border-border bg-background text-foreground shadow-[0_2px_8px_-2px_rgba(0,0,0,0.16)] transition-colors hover:bg-muted focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring"
-          aria-label={t("settings.profile.changePicture")}
-        >
-          <HugeiconsIcon icon={Edit03Icon} className="size-3.5" strokeWidth={2} />
-        </button>
-      </div>
+    <div className="flex w-full flex-col">
+      <input
+        ref={fileInputRef}
+        type="file"
+        accept="image/jpeg,image/png,image/webp,image/gif"
+        className="sr-only"
+        onChange={(e) => {
+          void onPickFile(e.target.files?.[0]);
+          e.target.value = "";
+        }}
+      />
 
-      <div
-        data-settings-label={t("settings.profile.displayName")}
-        className="flex w-full max-w-[560px] flex-col gap-2"
-      >
-        <Label htmlFor="profile-display-name" className="text-xs font-medium text-muted-foreground">
-          {t("settings.profile.displayName")}
-        </Label>
-        <div className="flex items-center gap-2">
-          <Input
-            id="profile-display-name"
-            type="text"
-            value={draftName}
-            maxLength={PROFILE_TEXT_MAX_LENGTH}
-            onChange={(e) => setDraftName(e.target.value)}
-            onKeyDown={(e) => {
-              if (e.key === "Enter") {
-                e.preventDefault();
-                saveName();
-              }
-            }}
-            autoComplete="off"
-            placeholder={sessionSub || "Unsloth"}
-            className="h-10 min-w-0 flex-1 rounded-full text-sm"
-          />
-          <Button type="button" size="sm" className="h-10 px-5" onClick={saveName} disabled={!hasNameChanges}>
-            {t("common.save")}
-          </Button>
-        </div>
-      </div>
-
-      <div
-        data-settings-label={t("settings.profile.nickname")}
-        className="flex w-full max-w-[560px] flex-col gap-2"
-      >
-        <Label htmlFor="profile-nickname" className="text-xs font-medium text-muted-foreground">
-          {t("settings.profile.nickname")}
-        </Label>
-        <div className="flex items-center gap-2">
-          <Input
-            id="profile-nickname"
-            type="text"
-            value={draftNickname}
-            maxLength={PROFILE_TEXT_MAX_LENGTH}
-            onChange={(e) => setDraftNickname(e.target.value)}
-            onKeyDown={(e) => {
-              if (e.key === "Enter") {
-                e.preventDefault();
-                saveNickname();
-              }
-            }}
-            autoComplete="off"
-            placeholder={t("settings.profile.nicknamePlaceholder")}
-            className="h-10 min-w-0 flex-1 rounded-full text-sm"
-          />
-          <Button type="button" size="sm" className="h-10 px-5" onClick={saveNickname} disabled={!hasNicknameChanges}>
-            {t("common.save")}
-          </Button>
-        </div>
-      </div>
-
-      <div
-        data-settings-label={t("settings.profile.avatarShape")}
-        className="flex w-full max-w-[560px] flex-col gap-2"
-      >
-        <Label className="text-xs font-medium text-muted-foreground">
-          {t("settings.profile.avatarShape")}
-        </Label>
-        <div className="hub-tab-toggle inline-flex h-8 w-fit items-center rounded-full">
-          {(["circle", "rounded"] as const).map((shape) => (
-            <button
-              key={shape}
-              type="button"
-              onClick={() => setAvatarShape(shape)}
-              aria-pressed={avatarShape === shape}
-              className={cn(
-                "inline-flex h-8 items-center rounded-full px-4 text-ui-13 font-medium transition-colors",
-                avatarShape === shape
-                  ? "hub-tab-toggle-pill text-foreground"
-                  : "text-muted-foreground hover:text-foreground",
-              )}
-            >
-              {shape === "circle"
-                ? t("settings.profile.avatarShapeCircle")
-                : t("settings.profile.avatarShapeRounded")}
-            </button>
-          ))}
-        </div>
-      </div>
-
-      <div
-        data-settings-label={t("settings.profile.greetingSloth")}
-        className="flex w-full max-w-[560px] items-center justify-between gap-4"
-      >
-        <div className="flex min-w-0 flex-col gap-0.5">
-          <Label
-            htmlFor="profile-greeting-sloth"
-            className="text-xs font-medium text-muted-foreground"
-          >
-            {t("settings.profile.greetingSloth")}
-          </Label>
-          <p className="text-xs text-muted-foreground/75">
-            {t("settings.profile.greetingSlothDescription")}
-          </p>
-        </div>
-        <Switch
-          id="profile-greeting-sloth"
-          checked={showGreetingSloth}
-          onCheckedChange={setShowGreetingSloth}
-        />
-      </div>
-
-      <div className="flex w-full max-w-[560px] flex-col gap-2">
-        <Label className="text-xs font-medium text-muted-foreground">
-          {t("settings.profile.chooseSloth")}
-        </Label>
-        <div className="grid grid-cols-7 gap-2 sm:grid-cols-9">
-          {SLOTH_AVATARS.map((path) => {
-            const url = publicAssetUrl(path);
-            const selected = shownAvatar === url;
-            const label =
-              path.split("/").pop()?.replace(/\.png$/i, "").replace(/^large\s+/i, "").trim() ??
-              "sloth";
-            return (
-              <button
-                key={path}
-                type="button"
-                onClick={() => pickSloth(path)}
-                aria-pressed={selected}
-                aria-label={label}
-                title={label}
-                className={cn(
-                  // No transition here: animating the ring makes the old
-                  // icon's selection border linger when switching sloths.
-                  "relative aspect-square overflow-hidden rounded-full bg-muted ring-1 ring-border hover:ring-ring focus-visible:outline-none focus-visible:ring-ring",
-                  // Selection keeps the 1px weight, only darker.
-                  selected && "ring-ring-strong hover:ring-ring-strong",
-                )}
-              >
-                <img src={url} alt="" loading="lazy" className="size-full object-cover" />
-              </button>
-            );
-          })}
+      <div className="flex items-center gap-10 py-6 pr-2">
+        <div className="relative shrink-0">
+          {/* The picture itself is the shortcut to "upload a photo"; the pencil
+              opens the rest of the options. */}
           <button
             type="button"
-            onClick={() => pickAvatarValue(null)}
-            aria-pressed={shownAvatar === null}
-            aria-label={t("settings.profile.noPicture")}
-            title={t("settings.profile.noPicture")}
-            className={cn(
-              "relative flex aspect-square items-center justify-center overflow-hidden rounded-full bg-muted text-muted-foreground ring-1 ring-border hover:ring-ring focus-visible:outline-none focus-visible:ring-ring",
-              shownAvatar === null && "ring-ring-strong hover:ring-ring-strong",
-            )}
+            onClick={() => fileInputRef.current?.click()}
+            aria-label={t("settings.profile.changePicture")}
+            className="group relative block rounded-full focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring"
           >
-            <span className="text-ui-11 font-medium">
-              {t("settings.profile.noneLabel")}
+            <UserAvatar
+              name={previewName}
+              imageUrl={shownAvatar}
+              size="lg"
+              className="size-[128px] text-[calc(3.2rem*var(--ui-font-scale,1))]"
+            />
+            <span className="absolute inset-0 flex items-center justify-center rounded-full bg-black/45 opacity-0 transition-opacity group-hover:opacity-100">
+              <HugeiconsIcon
+                icon={Image01Icon}
+                className="size-8 text-white"
+                strokeWidth={2}
+              />
             </span>
           </button>
+
+          <Popover open={pickerOpen} onOpenChange={setPickerOpen}>
+            <PopoverTrigger asChild={true}>
+              <button
+                type="button"
+                aria-label={t("settings.profile.pictureOptions")}
+                title={t("settings.profile.pictureOptions")}
+                className="absolute top-[85.36%] left-[85.36%] flex size-9 -translate-x-1/2 -translate-y-1/2 items-center justify-center rounded-full border border-border bg-background text-foreground shadow-[0_2px_8px_-2px_rgba(0,0,0,0.16)] transition-colors hover:bg-muted focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring dark:border-transparent dark:bg-white/[0.14] dark:hover:bg-white/20"
+              >
+                <HugeiconsIcon
+                  icon={Edit03Icon}
+                  className="size-4.5"
+                  strokeWidth={2}
+                />
+              </button>
+            </PopoverTrigger>
+            <PopoverContent
+              align="start"
+              sideOffset={10}
+              className="w-[320px] gap-4 p-4"
+            >
+              <div className="flex items-center justify-between gap-3">
+                <span className="text-ui-11 font-medium uppercase tracking-wide text-muted-foreground">
+                  {t("settings.profile.avatarShape")}
+                </span>
+                <div className="hub-tab-toggle flex h-8 shrink-0 items-center rounded-full">
+                  {(["circle", "rounded"] as const).map((shape) => (
+                    <button
+                      key={shape}
+                      type="button"
+                      onClick={() => setAvatarShape(shape)}
+                      aria-pressed={avatarShape === shape}
+                      className={cn(
+                        "inline-flex h-8 items-center justify-center rounded-full px-3.5 text-ui-13 font-medium transition-colors",
+                        avatarShape === shape
+                          ? "hub-tab-toggle-pill text-foreground"
+                          : "text-muted-foreground hover:text-foreground",
+                      )}
+                    >
+                      {shape === "circle"
+                        ? t("settings.profile.avatarShapeCircle")
+                        : t("settings.profile.avatarShapeRounded")}
+                    </button>
+                  ))}
+                </div>
+              </div>
+
+              <div className="flex items-center gap-2">
+                <Button
+                  type="button"
+                  variant="outline"
+                  onClick={() => fileInputRef.current?.click()}
+                  className="h-9 w-fit gap-2 rounded-full px-4 text-sm"
+                >
+                  <HugeiconsIcon
+                    icon={Upload01Icon}
+                    className="size-4"
+                    strokeWidth={2}
+                  />
+                  {t("settings.profile.uploadPhoto")}
+                </Button>
+                <Button
+                  type="button"
+                  variant="ghost"
+                  onClick={() => pickAvatarValue(null)}
+                  disabled={shownAvatar === null}
+                  aria-label={t("settings.profile.removePhoto")}
+                  title={t("settings.profile.removePhoto")}
+                  className="size-9 shrink-0 rounded-full p-0 text-muted-foreground"
+                >
+                  <HugeiconsIcon
+                    icon={Delete02Icon}
+                    className="size-4"
+                    strokeWidth={2}
+                  />
+                </Button>
+              </div>
+
+              <div className="flex flex-col gap-2">
+                <span className="text-ui-11 font-medium uppercase tracking-wide text-muted-foreground">
+                  {t("settings.profile.chooseSloth")}
+                </span>
+                <div className="grid grid-cols-7 gap-2">
+                  {SLOTH_AVATARS.map((path) => {
+                    const url = publicAssetUrl(path);
+                    const selected = shownAvatar === url;
+                    const label =
+                      path
+                        .split("/")
+                        .pop()
+                        ?.replace(PNG_SUFFIX, "")
+                        .replace(SLOTH_NAME, "")
+                        .trim() ?? "sloth";
+                    return (
+                      <button
+                        key={path}
+                        type="button"
+                        onClick={() => pickAvatarValue(url)}
+                        aria-pressed={selected}
+                        aria-label={label}
+                        title={label}
+                        className={cn(
+                          // No transition here: animating the ring makes the old
+                          // icon's selection border linger when switching sloths.
+                          "relative aspect-square overflow-hidden rounded-full bg-muted ring-1 ring-border hover:ring-ring focus-visible:outline-none focus-visible:ring-ring",
+                          selected &&
+                            "ring-2 ring-ring-strong hover:ring-ring-strong",
+                        )}
+                      >
+                        <img
+                          src={url}
+                          alt=""
+                          loading="lazy"
+                          className="size-full object-cover"
+                        />
+                      </button>
+                    );
+                  })}
+                </div>
+              </div>
+            </PopoverContent>
+          </Popover>
+        </div>
+
+        {/* Name fields sit beside the picture. These are not SettingsRows, so
+            data-settings-label is set by hand for settings search. */}
+        <div className="flex min-w-0 flex-1 flex-col gap-3">
+          <div
+            data-settings-label={t("settings.profile.displayName")}
+            className="flex min-w-0 flex-col gap-1.5"
+          >
+            <Label
+              htmlFor="profile-display-name"
+              className="text-xs font-medium text-muted-foreground"
+            >
+              {t("settings.profile.displayName")}
+            </Label>
+            <Input
+              id="profile-display-name"
+              type="text"
+              value={draftName}
+              maxLength={PROFILE_TEXT_MAX_LENGTH}
+              onChange={(e) => setDraftName(e.target.value)}
+              onBlur={saveName}
+              onKeyDown={(e) => {
+                if (e.key === "Enter") {
+                  e.preventDefault();
+                  e.currentTarget.blur();
+                }
+              }}
+              autoComplete="off"
+              placeholder={sessionSub || "Unsloth"}
+              className="h-9 w-full rounded-full text-sm"
+            />
+          </div>
+
+          <div
+            data-settings-label={t("settings.profile.nickname")}
+            className="flex min-w-0 flex-col gap-1.5"
+          >
+            <Label
+              htmlFor="profile-nickname"
+              className="text-xs font-medium text-muted-foreground"
+            >
+              {t("settings.profile.nickname")}
+            </Label>
+            <Input
+              id="profile-nickname"
+              type="text"
+              value={draftNickname}
+              maxLength={PROFILE_TEXT_MAX_LENGTH}
+              onChange={(e) => setDraftNickname(e.target.value)}
+              onBlur={saveNickname}
+              onKeyDown={(e) => {
+                if (e.key === "Enter") {
+                  e.preventDefault();
+                  e.currentTarget.blur();
+                }
+              }}
+              autoComplete="off"
+              placeholder={t("settings.profile.nicknamePlaceholder")}
+              className="h-9 w-full rounded-full text-sm"
+            />
+          </div>
         </div>
       </div>
 
       {imageError ? (
-        <p className="w-full text-xs text-destructive" role="alert">
+        <p className="pt-2 text-xs text-destructive" role="alert">
           {imageError}
         </p>
       ) : null}

studio/frontend/src/features/profile/components/stats/insights-card.tsx

@@ -0,0 +1,151 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+// Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
+
+import { useT } from "@/i18n";
+import type { ProfileStats } from "../../api/profile-stats";
+import {
+  formatCompactNumber,
+  formatDuration,
+  formatFullNumber,
+  formatMilliseconds,
+} from "../../utils/stats-format";
+import { StatMeter, StatRow, StatsCard } from "./stat-primitives";
+
+/** Left column: the "how you use Unsloth" numbers. */
+export function ActivityInsightsCard({ stats }: { stats: ProfileStats }) {
+  const t = useT();
+  const { totals, speed } = stats;
+  const averageTokensPerChat =
+    totals.threads > 0 ? totals.totalTokens / totals.threads : 0;
+  const cacheShare =
+    totals.promptTokens > 0 ? totals.cachedTokens / totals.promptTokens : 0;
+
+  return (
+    <StatsCard title={t("settings.profile.stats.insightsTitle")}>
+      <div className="flex flex-col divide-y divide-border/60">
+        <StatRow
+          label={t("settings.profile.stats.totalChats")}
+          value={formatFullNumber(totals.threads)}
+        />
+        <StatRow
+          label={t("settings.profile.stats.totalMessages")}
+          value={formatFullNumber(totals.messages)}
+        />
+        <StatRow
+          label={t("settings.profile.stats.tokensIn")}
+          value={formatCompactNumber(totals.promptTokens)}
+        />
+        <StatRow
+          label={t("settings.profile.stats.tokensOut")}
+          value={formatCompactNumber(totals.completionTokens)}
+        />
+        <StatRow
+          label={t("settings.profile.stats.cachedTokens")}
+          value={
+            cacheShare > 0
+              ? t("settings.profile.stats.cachedValue", {
+                  tokens: formatCompactNumber(totals.cachedTokens),
+                  percent: Math.round(cacheShare * 100),
+                })
+              : formatCompactNumber(totals.cachedTokens)
+          }
+        />
+        <StatRow
+          label={t("settings.profile.stats.avgTokensPerChat")}
+          value={formatCompactNumber(averageTokensPerChat)}
+        />
+        <StatRow
+          label={t("settings.profile.stats.timeInChat")}
+          value={formatDuration(totals.chatSeconds)}
+        />
+        <StatRow
+          label={t("settings.profile.stats.activeDays")}
+          value={formatFullNumber(totals.activeDays)}
+        />
+        <StatRow
+          label={t("settings.profile.stats.toolCalls")}
+          value={formatFullNumber(totals.toolCalls)}
+        />
+        <StatRow
+          label={t("settings.profile.stats.attachments")}
+          value={formatFullNumber(totals.attachments)}
+        />
+        <StatRow
+          label={t("settings.profile.stats.avgSpeed")}
+          value={
+            speed.averageTokensPerSecond === null
+              ? "—"
+              : t("settings.profile.stats.tokensPerSecond", {
+                  value: speed.averageTokensPerSecond.toFixed(1),
+                })
+          }
+        />
+        <StatRow
+          label={t("settings.profile.stats.bestSpeed")}
+          value={
+            speed.bestTokensPerSecond === null
+              ? "—"
+              : t("settings.profile.stats.tokensPerSecond", {
+                  value: speed.bestTokensPerSecond.toFixed(1),
+                })
+          }
+        />
+        <StatRow
+          label={t("settings.profile.stats.firstToken")}
+          value={
+            speed.averageFirstTokenMs === null
+              ? "—"
+              : formatMilliseconds(speed.averageFirstTokenMs)
+          }
+        />
+      </div>
+    </StatsCard>
+  );
+}
+
+/** Right column: model leaderboard, ranked by tokens exchanged. */
+export function TopModelsCard({ stats }: { stats: ProfileStats }) {
+  const t = useT();
+  const models = stats.models;
+  const peak = models.reduce((max, model) => Math.max(max, model.tokens), 0);
+
+  return (
+    <StatsCard
+      title={t("settings.profile.stats.topModelsTitle")}
+      description={t("settings.profile.stats.topModelsDescription")}
+    >
+      {models.length === 0 ? (
+        <p className="py-6 text-center text-xs text-muted-foreground">
+          {t("settings.profile.stats.noModels")}
+        </p>
+      ) : (
+        <ol className="flex flex-col gap-3">
+          {models.map((model, index) => (
+            <li key={model.id} className="flex flex-col gap-1.5">
+              <div className="flex items-baseline justify-between gap-3">
+                <span className="flex min-w-0 items-baseline gap-2">
+                  <span className="w-4 shrink-0 text-ui-11 tabular-nums text-muted-foreground">
+                    {index + 1}
+                  </span>
+                  <span
+                    className="min-w-0 truncate text-sm text-foreground"
+                    title={model.id}
+                  >
+                    {model.label}
+                  </span>
+                </span>
+                <span className="shrink-0 text-xs tabular-nums text-muted-foreground">
+                  {t("settings.profile.stats.modelSummary", {
+                    tokens: formatCompactNumber(model.tokens),
+                    messages: formatFullNumber(model.messages),
+                  })}
+                </span>
+              </div>
+              <StatMeter progress={peak > 0 ? model.tokens / peak : 0} />
+            </li>
+          ))}
+        </ol>
+      )}
+    </StatsCard>
+  );
+}

studio/frontend/src/features/profile/components/stats/profile-stats-content.tsx

@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+// Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
+
+import { Button } from "@/components/ui/button";
+import { useT } from "@/i18n";
+import { useProfileStats } from "../../hooks/use-profile-stats";
+import { ActivityInsightsCard, TopModelsCard } from "./insights-card";
+import { StatsCard } from "./stat-primitives";
+import { StatsHighlights } from "./stats-highlights";
+import { StatsSkeleton } from "./stats-skeleton";
+import { TokenActivityCard } from "./token-activity-card";
+import { TrainingHighlightsCard } from "./training-card";
+
+/**
+ * Everything below the personalization form on the Profile tab: headline
+ * numbers, activity grid, insights and training.
+ *
+ * All of it comes from `/api/profile/stats`, which reads local history only.
+ *
+ * Loaded lazily by `profile-stats-panel.tsx` so none of it reaches the main
+ * bundle, since the Profile tab is the only place it renders.
+ */
+export function ProfileStatsContent() {
+  const t = useT();
+  const { stats, loading, error, reload } = useProfileStats();
+
+  if (loading && stats === null) {
+    return <StatsSkeleton />;
+  }
+
+  if (error !== null && stats === null) {
+    return (
+      <StatsCard title={t("settings.profile.stats.title")}>
+        <div className="flex flex-col items-center gap-3 py-4 text-center">
+          <p className="text-xs text-muted-foreground">{error}</p>
+          <Button type="button" size="sm" variant="outline" onClick={reload}>
+            {t("settings.profile.stats.retry")}
+          </Button>
+        </div>
+      </StatsCard>
+    );
+  }
+
+  if (stats === null) return null;
+
+  const hasChats = stats.totals.messages > 0;
+  const hasTraining = stats.training.runs > 0;
+
+  return (
+    <div className="flex w-full flex-col gap-4">
+      <header className="flex flex-col gap-0.5">
+        <h2
+          data-settings-label={t("settings.profile.stats.title")}
+          className="text-base font-semibold font-heading text-foreground"
+        >
+          {t("settings.profile.stats.title")}
+        </h2>
+        <p className="text-xs text-muted-foreground">
+          {t("settings.profile.stats.subtitle")}
+        </p>
+      </header>
+
+      <StatsHighlights stats={stats} />
+
+      {hasChats ? (
+        <>
+          <TokenActivityCard daily={stats.daily} />
+          <div className="grid grid-cols-1 gap-4 lg:grid-cols-2">
+            <ActivityInsightsCard stats={stats} />
+            <TopModelsCard stats={stats} />
+          </div>
+        </>
+      ) : (
+        <StatsCard>
+          <p className="py-6 text-center text-xs text-muted-foreground">
+            {t("settings.profile.stats.emptyChats")}
+          </p>
+        </StatsCard>
+      )}
+
+      {hasTraining ? <TrainingHighlightsCard stats={stats} /> : null}
+
+      <p className="px-1 pb-2 text-ui-11 text-muted-foreground">
+        {t("settings.profile.stats.privacyNote")}
+      </p>
+    </div>
+  );
+}

studio/frontend/src/features/profile/components/stats/profile-stats-panel.tsx

@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+// Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
+
+import { Suspense, lazy } from "react";
+import { StatsSkeleton } from "./stats-skeleton";
+
+// The stats content pulls in recharts for the rhythm charts. Settings live in
+// the main bundle, so importing it eagerly would move ~300 KB of charting off
+// its own lazy chunk and onto every cold app load. Split it here instead: the
+// chunk is fetched only when someone actually opens Settings -> Profile.
+const ProfileStatsContent = lazy(() =>
+  import("./profile-stats-content").then((module) => ({
+    default: module.ProfileStatsContent,
+  })),
+);
+
+export function ProfileStatsPanel() {
+  return (
+    <Suspense fallback={<StatsSkeleton />}>
+      <ProfileStatsContent />
+    </Suspense>
+  );
+}

studio/frontend/src/features/profile/components/stats/stat-primitives.tsx

@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+// Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
+
+import { cn } from "@/lib/utils";
+import type { ReactNode } from "react";
+
+/** Bordered surface every stats block sits on, matching the profile card. */
+export function StatsCard({
+  title,
+  description,
+  action,
+  children,
+  className,
+}: {
+  title?: string;
+  description?: string;
+  action?: ReactNode;
+  children: ReactNode;
+  className?: string;
+}) {
+  return (
+    <section
+      {...(title ? { "data-settings-label": title } : {})}
+      className={cn(
+        "flex w-full flex-col gap-4 rounded-2xl border border-border bg-background dark:border-transparent dark:bg-white/[0.06] px-5 py-5",
+        className,
+      )}
+    >
+      {title ? (
+        <header className="flex items-start justify-between gap-3">
+          <div className="flex min-w-0 flex-col gap-0.5">
+            <h3 className="text-sm font-semibold font-heading text-foreground">
+              {title}
+            </h3>
+            {description ? (
+              <p className="text-xs text-muted-foreground">{description}</p>
+            ) : null}
+          </div>
+          {action ? <div className="shrink-0">{action}</div> : null}
+        </header>
+      ) : null}
+      {children}
+    </section>
+  );
+}
+
+/** Big number + caption, used across the highlight and training rows. */
+export function StatTile({
+  value,
+  label,
+  hint,
+  className,
+}: {
+  value: string;
+  label: string;
+  hint?: string;
+  className?: string;
+}) {
+  return (
+    <div
+      data-settings-label={label}
+      className={cn(
+        "flex min-w-0 flex-col items-center gap-0.5 px-2 py-1 text-center",
+        className,
+      )}
+      {...(hint ? { title: hint } : {})}
+    >
+      <span className="text-xl font-semibold font-heading tabular-nums text-foreground">
+        {value}
+      </span>
+      <span className="text-xs text-muted-foreground">{label}</span>
+    </div>
+  );
+}
+
+/** Label left, value right: the "Activity insights" rows. */
+export function StatRow({
+  label,
+  value,
+  emphasis,
+}: {
+  label: string;
+  value: string;
+  emphasis?: boolean;
+}) {
+  return (
+    <div
+      data-settings-label={label}
+      className="flex items-center justify-between gap-4 py-1.5"
+    >
+      <span className="min-w-0 truncate text-sm text-muted-foreground">
+        {label}
+      </span>
+      <span
+        className={cn(
+          "shrink-0 text-sm tabular-nums",
+          emphasis ? "font-semibold text-foreground" : "text-foreground",
+        )}
+      >
+        {value}
+      </span>
+    </div>
+  );
+}
+
+/** Thin progress track (level bar, achievement progress, model share). */
+export function StatMeter({
+  progress,
+  className,
+  tone = "primary",
+}: {
+  progress: number;
+  className?: string;
+  tone?: "primary" | "muted";
+}) {
+  const clamped = Math.min(
+    1,
+    Math.max(0, Number.isFinite(progress) ? progress : 0),
+  );
+  return (
+    <div
+      className={cn(
+        "h-1.5 w-full overflow-hidden rounded-full bg-muted-foreground/15",
+        className,
+      )}
+    >
+      <div
+        className={cn(
+          "h-full rounded-full transition-[width] duration-500",
+          tone === "primary" ? "bg-primary" : "bg-muted-foreground/50",
+        )}
+        style={{ width: `${clamped * 100}%` }}
+      />
+    </div>
+  );
+}

studio/frontend/src/features/profile/components/stats/stats-highlights.tsx

@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+// Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
+
+import { useT } from "@/i18n";
+import type { ProfileStats } from "../../api/profile-stats";
+import {
+  formatCompactNumber,
+  formatDuration,
+  formatFullNumber,
+} from "../../utils/stats-format";
+import { StatTile } from "./stat-primitives";
+
+/** The five headline numbers, mirroring the app's top-of-profile summary. */
+export function StatsHighlights({ stats }: { stats: ProfileStats }) {
+  const t = useT();
+  const { totals, streak, peakDay, longestChat } = stats;
+  const days = (count: number) =>
+    count === 1
+      ? t("settings.profile.stats.dayCountOne")
+      : t("settings.profile.stats.dayCount", { count });
+
+  return (
+    <div className="grid grid-cols-2 gap-y-5 rounded-2xl border border-border bg-background dark:border-transparent dark:bg-white/[0.06] px-4 py-5 sm:grid-cols-3 lg:grid-cols-5">
+      <StatTile
+        value={formatCompactNumber(totals.totalTokens)}
+        label={t("settings.profile.stats.lifetimeTokens")}
+        hint={formatFullNumber(totals.totalTokens)}
+      />
+      <StatTile
+        value={peakDay ? formatCompactNumber(peakDay.tokens) : "—"}
+        label={t("settings.profile.stats.peakTokens")}
+        {...(peakDay ? { hint: peakDay.date } : {})}
+      />
+      <StatTile
+        value={longestChat ? formatDuration(longestChat.seconds) : "—"}
+        label={t("settings.profile.stats.longestChat")}
+        {...(longestChat?.title ? { hint: longestChat.title } : {})}
+      />
+      <StatTile
+        value={days(streak.current)}
+        label={t("settings.profile.stats.currentStreak")}
+      />
+      <StatTile
+        value={days(streak.longest)}
+        label={t("settings.profile.stats.longestStreak")}
+      />
+    </div>
+  );
+}

studio/frontend/src/features/profile/components/stats/stats-skeleton.tsx

@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+// Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
+
+import { Skeleton } from "@/components/ui/skeleton";
+
+/**
+ * Placeholder for the stats panel.
+ *
+ * Its own module so the lazy wrapper can render it as a Suspense fallback
+ * without pulling the chart-bearing content chunk into the main bundle.
+ */
+export function StatsSkeleton() {
+  return (
+    <div className="flex flex-col gap-4">
+      <Skeleton className="h-20 w-full rounded-2xl" />
+      <Skeleton className="h-24 w-full rounded-2xl" />
+      <Skeleton className="h-56 w-full rounded-2xl" />
+      <div className="grid grid-cols-1 gap-4 lg:grid-cols-2">
+        <Skeleton className="h-72 w-full rounded-2xl" />
+        <Skeleton className="h-72 w-full rounded-2xl" />
+      </div>
+    </div>
+  );
+}

studio/frontend/src/features/profile/components/stats/token-activity-card.tsx

@@ -0,0 +1,371 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+// Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
+
+import { useLocale, useT } from "@/i18n";
+import { cn } from "@/lib/utils";
+import { useEffect, useMemo, useRef, useState } from "react";
+import type { ProfileStatsDay } from "../../api/profile-stats";
+import {
+  type ActivityMode,
+  formatCompactNumber,
+  formatFullNumber,
+  heatLevel,
+  parseDayKey,
+  seriesForMode,
+  windowBaseline,
+} from "../../utils/stats-format";
+import { StatsCard } from "./stat-primitives";
+
+const DAYS_PER_WEEK = 7;
+const CELL_SIZE = 11;
+const CELL_GAP = 3;
+const COLUMN_WIDTH = CELL_SIZE + CELL_GAP;
+const MIN_COLUMNS = 8;
+const HEAT_OPACITY = [0, 0.4, 0.62, 0.8, 1] as const;
+// Weekly and cumulative are on/off, so they use one flat shade.
+const SOLID_LEVEL = 4;
+const MODES: ActivityMode[] = ["daily", "weekly", "cumulative"];
+
+type Cell = {
+  key: string;
+  day: ProfileStatsDay | null;
+  value: number;
+};
+
+/**
+ * Trim the series to the most recent `columns` weeks, ending on a partial
+ * current week. The grid never scrolls, so older days fall off the left.
+ */
+function buildColumns(
+  daily: ProfileStatsDay[],
+  values: number[],
+  columns: number,
+  mode: ActivityMode,
+): Cell[][] {
+  if (daily.length === 0 || columns <= 0) return [];
+
+  const lastDay = daily.at(-1);
+  if (!lastDay) return [];
+  // Days after today in the final (partial) week.
+  const trailing =
+    DAYS_PER_WEEK -
+    1 -
+    ((parseDayKey(lastDay.date).getDay() + 6) % DAYS_PER_WEEK);
+  const capacity = columns * DAYS_PER_WEEK - trailing;
+  const start = Math.max(0, daily.length - capacity);
+  const visible = daily.slice(start);
+  // Cumulative is a running total over what the grid shows, so a narrow card
+  // that drops older weeks has to rebase off the last hidden day.
+  const baseline = windowBaseline(values, start, mode);
+
+  const cells: Cell[] = [];
+  // Pad so every column is a Monday-started week.
+  const firstVisible = visible[0];
+  if (!firstVisible) return [];
+  const leading = (parseDayKey(firstVisible.date).getDay() + 6) % DAYS_PER_WEEK;
+  for (let index = 0; index < leading; index += 1) {
+    cells.push({ key: `pad-${index}`, day: null, value: 0 });
+  }
+  for (const [index, day] of visible.entries()) {
+    cells.push({
+      key: day.date,
+      day,
+      value: (values[start + index] ?? 0) - baseline,
+    });
+  }
+
+  const grid: Cell[][] = [];
+  for (let index = 0; index < cells.length; index += DAYS_PER_WEEK) {
+    grid.push(cells.slice(index, index + DAYS_PER_WEEK));
+  }
+  return grid;
+}
+
+/** Month captions under the grid, one per column where the month turns over. */
+function buildMonthLabels(grid: Cell[][], locale: string) {
+  const formatter = new Intl.DateTimeFormat(locale, { month: "short" });
+  const labels: Array<{ key: string; column: number; text: string }> = [];
+  let lastMonth = -1;
+  for (const [columnIndex, column] of grid.entries()) {
+    const firstDay = column.find((cell) => cell.day !== null)?.day;
+    if (!firstDay) continue;
+    const date = parseDayKey(firstDay.date);
+    if (date.getMonth() === lastMonth) continue;
+    lastMonth = date.getMonth();
+    // Skip a label that would collide with the previous one, or run off the end.
+    const previous = labels.at(-1);
+    if (previous && columnIndex - previous.column < 3) continue;
+    if (columnIndex > grid.length - 3) continue;
+    labels.push({
+      key: firstDay.date,
+      column: columnIndex,
+      text: formatter.format(date),
+    });
+  }
+  return labels;
+}
+
+/**
+ * Per-column totals for the bar modes. Shading every day of an active week
+ * instead would fill the grid solid and hide the shape.
+ */
+function columnSummary(column: Cell[]) {
+  let value = 0;
+  let tokens = 0;
+  let firstDay: string | null = null;
+  for (const cell of column) {
+    if (!cell.day) continue;
+    value = Math.max(value, cell.value);
+    tokens += cell.day.tokens;
+    firstDay ??= cell.day.date;
+  }
+  return { value, tokens, firstDay };
+}
+
+/** Bar height in cells, at least one for any activity. */
+function barHeight(value: number, peakValue: number): number {
+  if (value <= 0 || peakValue <= 0) return 0;
+  return Math.max(1, Math.round((value / peakValue) * DAYS_PER_WEEK));
+}
+
+/** How many week columns fit the card's current width. */
+function useVisibleColumns(maxColumns: number) {
+  const ref = useRef<HTMLDivElement>(null);
+  const [columns, setColumns] = useState(maxColumns);
+
+  useEffect(() => {
+    const element = ref.current;
+    if (!element) return;
+    const measure = () => {
+      const width = element.clientWidth;
+      if (width <= 0) return;
+      // The final column carries no trailing gap.
+      const fits = Math.floor((width + CELL_GAP) / COLUMN_WIDTH);
+      setColumns(Math.max(MIN_COLUMNS, Math.min(maxColumns, fits)));
+    };
+    measure();
+    const observer = new ResizeObserver(measure);
+    observer.observe(element);
+    return () => observer.disconnect();
+  }, [maxColumns]);
+
+  return { ref, columns };
+}
+
+const CELL_CLASS = "size-[11px] rounded-[3px]";
+
+function Block({
+  title,
+  tone,
+}: { title: string; tone: 0 | 1 | 2 | 3 | 4 | -1 }) {
+  return (
+    <div
+      title={title}
+      className={cn(
+        CELL_CLASS,
+        tone === -1
+          ? "bg-transparent"
+          : tone === 0
+            ? "bg-muted-foreground/12"
+            : "bg-primary",
+      )}
+      style={
+        tone > 0 ? { opacity: HEAT_OPACITY[tone as 1 | 2 | 3 | 4] } : undefined
+      }
+    />
+  );
+}
+
+/** Daily: each day shaded by its own volume. */
+function DayColumn({
+  column,
+  peak,
+  dateFormatter,
+}: {
+  column: Cell[];
+  peak: number;
+  dateFormatter: Intl.DateTimeFormat;
+}) {
+  const t = useT();
+
+  return (
+    <div className="flex flex-col gap-[3px]">
+      {column.map((cell) => {
+        if (!cell.day) {
+          return <Block key={cell.key} title="" tone={-1} />;
+        }
+        return (
+          <Block
+            key={cell.key}
+            tone={heatLevel(cell.value, peak)}
+            title={t("settings.profile.stats.cellTooltip", {
+              tokens: formatFullNumber(cell.day.tokens),
+              messages: formatFullNumber(cell.day.messages),
+              date: dateFormatter.format(parseDayKey(cell.day.date)),
+            })}
+          />
+        );
+      })}
+    </div>
+  );
+}
+
+/** Weekly and cumulative: one flat bar per column, anchored to the bottom. */
+function BarColumn({
+  column,
+  peak,
+  dateFormatter,
+}: {
+  column: Cell[];
+  peak: number;
+  dateFormatter: Intl.DateTimeFormat;
+}) {
+  const t = useT();
+  const summary = columnSummary(column);
+  const height = barHeight(summary.value, peak);
+  // The bar is scaled by summary.value, which in cumulative mode is the
+  // running total. The tooltip says "week of", so it reports that week.
+  const title = summary.firstDay
+    ? t("settings.profile.stats.weekTooltip", {
+        date: dateFormatter.format(parseDayKey(summary.firstDay)),
+        tokens: formatFullNumber(summary.tokens),
+      })
+    : "";
+
+  return (
+    <div className="flex flex-col gap-[3px]">
+      {Array.from({ length: DAYS_PER_WEEK }, (_, row) => (
+        <Block
+          key={column[row]?.key ?? `slot-${row}`}
+          title={title}
+          tone={row >= DAYS_PER_WEEK - height ? SOLID_LEVEL : 0}
+        />
+      ))}
+    </div>
+  );
+}
+
+export function TokenActivityCard({ daily }: { daily: ProfileStatsDay[] }) {
+  const t = useT();
+  const [mode, setMode] = useState<ActivityMode>("daily");
+  const maxColumns = Math.ceil(daily.length / DAYS_PER_WEEK) + 1;
+  const { ref, columns } = useVisibleColumns(maxColumns);
+
+  const shaded = mode === "daily";
+  const values = useMemo(() => seriesForMode(daily, mode), [daily, mode]);
+  const grid = useMemo(
+    () => buildColumns(daily, values, columns, mode),
+    [daily, values, columns, mode],
+  );
+  // The app language, not the browser's: those differ whenever the user picks
+  // a language in Settings, and it has to be a dependency so switching while
+  // the panel is open rebuilds the formatters.
+  const locale = useLocale();
+  const monthLabels = useMemo(
+    () => buildMonthLabels(grid, locale),
+    [grid, locale],
+  );
+  // Daily scales against the busiest day, the bar modes against the busiest
+  // column, so a full-height bar always means the peak week.
+  const peak = useMemo(
+    () =>
+      shaded
+        ? grid.reduce(
+            (max, column) =>
+              column.reduce(
+                (best, cell) => Math.max(best, cell.day?.tokens ?? 0),
+                max,
+              ),
+            0,
+          )
+        : grid.reduce(
+            (max, column) => Math.max(max, columnSummary(column).value),
+            0,
+          ),
+    [grid, shaded],
+  );
+  const visibleTotal = useMemo(
+    () =>
+      grid.reduce(
+        (sum, column) =>
+          column.reduce((total, cell) => total + (cell.day?.tokens ?? 0), sum),
+        0,
+      ),
+    [grid],
+  );
+
+  const dateFormatter = useMemo(
+    () =>
+      new Intl.DateTimeFormat(locale, {
+        month: "short",
+        day: "numeric",
+        year: "numeric",
+      }),
+    [locale],
+  );
+
+  return (
+    <StatsCard
+      title={t("settings.profile.stats.activityTitle")}
+      description={t("settings.profile.stats.activityDescription", {
+        total: formatCompactNumber(visibleTotal),
+        weeks: grid.length,
+      })}
+      action={
+        <div className="hub-tab-toggle inline-flex h-8 w-fit items-center rounded-full">
+          {MODES.map((option) => (
+            <button
+              key={option}
+              type="button"
+              onClick={() => setMode(option)}
+              aria-pressed={mode === option}
+              className={cn(
+                "inline-flex h-8 items-center rounded-full px-3 text-ui-13 font-medium transition-colors",
+                mode === option
+                  ? "hub-tab-toggle-pill text-foreground"
+                  : "text-muted-foreground hover:text-foreground",
+              )}
+            >
+              {t(`settings.profile.stats.mode.${option}`)}
+            </button>
+          ))}
+        </div>
+      }
+    >
+      {/* Measured, never scrolled: the grid is trimmed to fit instead. */}
+      <div ref={ref} className="w-full overflow-hidden">
+        <div className="flex gap-[3px]">
+          {grid.map((column) =>
+            shaded ? (
+              <DayColumn
+                key={column[0]?.key ?? "column"}
+                column={column}
+                peak={peak}
+                dateFormatter={dateFormatter}
+              />
+            ) : (
+              <BarColumn
+                key={column[0]?.key ?? "column"}
+                column={column}
+                peak={peak}
+                dateFormatter={dateFormatter}
+              />
+            ),
+          )}
+        </div>
+
+        <div className="relative mt-2 h-4">
+          {monthLabels.map((label) => (
+            <span
+              key={label.key}
+              className="absolute top-0 text-ui-11 text-muted-foreground"
+              style={{ left: `${label.column * COLUMN_WIDTH}px` }}
+            >
+              {label.text}
+            </span>
+          ))}
+        </div>
+      </div>
+    </StatsCard>
+  );
+}

studio/frontend/src/features/profile/components/stats/training-card.tsx

@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+// Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
+
+import { useT } from "@/i18n";
+import { cn } from "@/lib/utils";
+import type { ProfileStats } from "../../api/profile-stats";
+import {
+  formatCompactNumber,
+  formatDuration,
+  formatFullNumber,
+} from "../../utils/stats-format";
+import { StatTile, StatsCard } from "./stat-primitives";
+
+const STATUS_TONE: Record<string, string> = {
+  completed: "text-primary",
+  running: "text-foreground",
+  error: "text-destructive",
+  stopped: "text-muted-foreground",
+};
+
+/** Training-side counterpart to the chat stats: runs, steps, GPU time, loss. */
+export function TrainingHighlightsCard({ stats }: { stats: ProfileStats }) {
+  const t = useT();
+  const { training } = stats;
+
+  return (
+    <StatsCard
+      title={t("settings.profile.stats.trainingTitle")}
+      description={t("settings.profile.stats.trainingDescription")}
+    >
+      <div className="grid grid-cols-2 gap-y-4 sm:grid-cols-3 lg:grid-cols-6">
+        <StatTile
+          value={formatFullNumber(training.runs)}
+          label={t("settings.profile.stats.trainingRuns")}
+        />
+        <StatTile
+          value={formatFullNumber(training.completed)}
+          label={t("settings.profile.stats.trainingCompleted")}
+        />
+        <StatTile
+          value={formatCompactNumber(training.steps)}
+          label={t("settings.profile.stats.trainingSteps")}
+        />
+        <StatTile
+          value={formatCompactNumber(training.tokens)}
+          label={t("settings.profile.stats.trainingTokens")}
+        />
+        <StatTile
+          value={formatDuration(training.seconds)}
+          label={t("settings.profile.stats.trainingTime")}
+        />
+        <StatTile
+          value={
+            training.bestLoss === null ? "—" : training.bestLoss.toFixed(3)
+          }
+          label={t("settings.profile.stats.bestLoss")}
+        />
+      </div>
+
+      {training.recent.length > 0 ? (
+        <ul className="flex flex-col divide-y divide-border/60 border-t border-border/60 pt-1">
+          {training.recent.map((run) => (
+            <li
+              key={run.id}
+              className="flex items-center justify-between gap-3 py-2"
+            >
+              <div className="flex min-w-0 flex-col gap-0.5">
+                {/* A renamed run leads with the name the user chose, so the
+                    model moves down beside the dataset to stay visible. */}
+                <span
+                  className="min-w-0 truncate text-sm text-foreground"
+                  title={run.name}
+                >
+                  {run.name}
+                </span>
+                <span className="min-w-0 truncate text-ui-11 text-muted-foreground">
+                  {run.name === run.modelLabel
+                    ? run.datasetLabel
+                    : `${run.modelLabel} · ${run.datasetLabel}`}
+                </span>
+              </div>
+              <div className="flex shrink-0 items-center gap-4 text-xs tabular-nums">
+                <span className="text-muted-foreground">
+                  {t("settings.profile.stats.runSteps", {
+                    steps: formatFullNumber(run.steps),
+                  })}
+                </span>
+                <span className="text-muted-foreground">
+                  {run.finalLoss === null
+                    ? "—"
+                    : t("settings.profile.stats.runLoss", {
+                        loss: run.finalLoss.toFixed(3),
+                      })}
+                </span>
+                <span
+                  className={cn(
+                    "w-16 text-right",
+                    STATUS_TONE[run.status] ?? "text-muted-foreground",
+                  )}
+                >
+                  {run.status}
+                </span>
+              </div>
+            </li>
+          ))}
+        </ul>
+      ) : null}
+    </StatsCard>
+  );
+}

studio/frontend/src/features/profile/components/user-avatar.tsx

@@ -30,14 +30,27 @@ const SHAPE: Record<AvatarShape, string> = {
   rounded: "rounded-[22%]",
 };
 
-export function UserAvatar({ name, imageUrl, size, className, shape }: UserAvatarProps) {
+export function UserAvatar({
+  name,
+  imageUrl,
+  size,
+  className,
+  shape,
+}: UserAvatarProps) {
   const label = initialsFromName(name);
   const storedShape = useUserProfileStore((s) => s.avatarShape);
   const shapeClass = SHAPE[shape ?? storedShape];
 
   if (imageUrl) {
     return (
-      <span className={cn("relative inline-flex shrink-0 overflow-hidden bg-transparent", shapeClass, SIZE[size], className)}>
+      <span
+        className={cn(
+          "relative inline-flex shrink-0 overflow-hidden bg-transparent",
+          shapeClass,
+          SIZE[size],
+          className,
+        )}
+      >
         <img src={imageUrl} alt="" className="size-full object-cover" />
       </span>
     );

studio/frontend/src/features/profile/hooks/use-personalization-sync.ts

@@ -238,7 +238,8 @@ export function usePersonalizationSync(enabled: boolean): void {
           // default so the push detects the diff) rather than treating the
           // default as an explicit remote choice. A record that actually stored
           // the field reports <field>Saved=true and still wins.
-          const localGreeting = useUserProfileStore.getState().showGreetingSloth;
+          const localGreeting =
+            useUserProfileStore.getState().showGreetingSloth;
           const remoteGreeting = remote.profile.showGreetingSloth !== false;
           const keepLocalGreeting =
             remote.greetingSlothSaved === false && localGreeting === false;
@@ -248,7 +249,9 @@ export function usePersonalizationSync(enabled: boolean): void {
             avatarDataUrl: remote.profile.avatarDataUrl ?? null,
             avatarShape:
               remote.profile.avatarShape === "rounded" ? "rounded" : "circle",
-            showGreetingSloth: keepLocalGreeting ? localGreeting : remoteGreeting,
+            showGreetingSloth: keepLocalGreeting
+              ? localGreeting
+              : remoteGreeting,
           };
           const nextTheme = remote.appearance.theme;
           const localPalette = latestPaletteRef.current;

studio/frontend/src/features/profile/hooks/use-profile-stats.ts

@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+// Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
+
+import { useCallback, useEffect, useRef, useState } from "react";
+import { type ProfileStats, loadProfileStats } from "../api/profile-stats";
+
+type ProfileStatsState = {
+  stats: ProfileStats | null;
+  loading: boolean;
+  error: string | null;
+  reload: () => void;
+};
+
+/** Load the profile stats on mount, with a manual refresh. */
+export function useProfileStats(): ProfileStatsState {
+  const [stats, setStats] = useState<ProfileStats | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  // A refresh aborts the in-flight request so a slow first load cannot land
+  // after (and overwrite) the newer one.
+  const abortRef = useRef<AbortController | null>(null);
+
+  const load = useCallback(async () => {
+    abortRef.current?.abort();
+    const controller = new AbortController();
+    abortRef.current = controller;
+    setLoading(true);
+    try {
+      const next = await loadProfileStats(controller.signal);
+      if (controller.signal.aborted) return;
+      setStats(next);
+      setError(null);
+    } catch (cause: unknown) {
+      if (controller.signal.aborted) return;
+      setError(cause instanceof Error ? cause.message : String(cause));
+    } finally {
+      if (!controller.signal.aborted) setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    void load();
+    return () => abortRef.current?.abort();
+  }, [load]);
+
+  const reload = useCallback(() => {
+    void load();
+  }, [load]);
+
+  return { stats, loading, error, reload };
+}

studio/frontend/src/features/profile/index.ts

@@ -2,6 +2,8 @@
 // Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
 
 export { ProfilePersonalizationPanel } from "./components/profile-personalization-panel";
+export { ProfileStatsPanel } from "./components/stats/profile-stats-panel";
 export { UserAvatar } from "./components/user-avatar";
 export { useEffectiveProfile } from "./hooks/use-effective-profile";
 export { usePersonalizationSync } from "./hooks/use-personalization-sync";
+export { useUserProfileStore } from "./stores/user-profile-store";

studio/frontend/src/features/profile/utils/resize-image-file.ts

@@ -28,7 +28,11 @@ function loadImage(file: File): Promise<HTMLImageElement> {
   });
 }
 
-function canvasHasTransparency(ctx: CanvasRenderingContext2D, width: number, height: number): boolean {
+function canvasHasTransparency(
+  ctx: CanvasRenderingContext2D,
+  width: number,
+  height: number,
+): boolean {
   const { data } = ctx.getImageData(0, 0, width, height);
   for (let i = 3; i < data.length; i += 4) {
     if (data[i] < 255) return true;
@@ -67,7 +71,12 @@ function drawScaled(
   w: number,
   h: number,
   maxEdge: number,
-): { canvas: HTMLCanvasElement; ctx: CanvasRenderingContext2D; cw: number; ch: number } {
+): {
+  canvas: HTMLCanvasElement;
+  ctx: CanvasRenderingContext2D;
+  cw: number;
+  ch: number;
+} {
   const scale = Math.min(1, maxEdge / Math.max(w, h));
   const cw = Math.max(1, Math.round(w * scale));
   const ch = Math.max(1, Math.round(h * scale));
@@ -96,16 +105,28 @@ export async function resizeImageFileToDataUrl(file: File): Promise<string> {
     // would paint a background behind a transparent image.
     for (let edge = MAX_EDGE; edge >= MIN_EDGE; edge -= EDGE_STEP) {
       const { canvas } = edge === MAX_EDGE ? base : drawScaled(img, w, h, edge);
-      const webpDataUrl = encodeCanvasWithinLimit(canvas, "image/webp", WEBP_QUALITY_START);
+      const webpDataUrl = encodeCanvasWithinLimit(
+        canvas,
+        "image/webp",
+        WEBP_QUALITY_START,
+      );
       if (webpDataUrl) return webpDataUrl;
       const pngDataUrl = encodePngWithinLimit(canvas);
       if (pngDataUrl) return pngDataUrl;
     }
-    throw new Error("Image is still too large after compression. Try a smaller file.");
+    throw new Error(
+      "Image is still too large after compression. Try a smaller file.",
+    );
   }
 
-  const jpegDataUrl = encodeCanvasWithinLimit(base.canvas, "image/jpeg", JPEG_QUALITY_START);
+  const jpegDataUrl = encodeCanvasWithinLimit(
+    base.canvas,
+    "image/jpeg",
+    JPEG_QUALITY_START,
+  );
   if (jpegDataUrl) return jpegDataUrl;
 
-  throw new Error("Image is still too large after compression. Try a smaller file.");
+  throw new Error(
+    "Image is still too large after compression. Try a smaller file.",
+  );
 }

studio/frontend/src/features/profile/utils/stats-format.ts

@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+// Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
+
+/**
+ * Formatting helpers for the profile stats panel.
+ *
+ * Kept free of React so the numbers can be unit-tested directly.
+ */
+
+const TRAILING_ZERO_DECIMAL = /\.0$/;
+
+/** Compact form used on every stat tile: 12.3K, 4.5M, 19.8B. */
+export function formatCompactNumber(value: number): string {
+  if (!Number.isFinite(value)) return "0";
+  const abs = Math.abs(value);
+  if (abs < 1000) return String(Math.round(value));
+
+  const units: Array<{ limit: number; suffix: string }> = [
+    { limit: 1e12, suffix: "T" },
+    { limit: 1e9, suffix: "B" },
+    { limit: 1e6, suffix: "M" },
+    { limit: 1e3, suffix: "K" },
+  ];
+  for (const [index, { limit, suffix }] of units.entries()) {
+    if (abs < limit) continue;
+    const scaled = value / limit;
+    // One decimal below 100 keeps "1.9B" readable; above it the decimal is noise.
+    const rounded =
+      Math.abs(scaled) >= 100 ? Math.round(scaled) : Number(scaled.toFixed(1));
+    // Rounding can push a value over the next boundary, and "1000K" is not
+    // compact. Step up a unit rather than print four digits.
+    const next = units[index - 1];
+    if (next && Math.abs(rounded) >= 1000) {
+      return `${(value / next.limit).toFixed(1).replace(TRAILING_ZERO_DECIMAL, "")}${next.suffix}`;
+    }
+    const text =
+      Math.abs(scaled) >= 100 ? rounded.toString() : scaled.toFixed(1);
+    return `${text.replace(TRAILING_ZERO_DECIMAL, "")}${suffix}`;
+  }
+  return String(Math.round(value));
+}
+
+export function formatFullNumber(value: number): string {
+  if (!Number.isFinite(value)) return "0";
+  return Math.round(value).toLocaleString();
+}
+
+/** Compact duration for chat and training time: 4h 8m, 12m 30s, 45s. */
+export function formatDuration(seconds: number): string {
+  if (!Number.isFinite(seconds) || seconds <= 0) return "0m";
+  const total = Math.round(seconds);
+  const days = Math.floor(total / 86400);
+  const hours = Math.floor((total % 86400) / 3600);
+  const minutes = Math.floor((total % 3600) / 60);
+  const secs = total % 60;
+
+  if (days > 0) return `${days}d ${hours}h`;
+  if (hours > 0) return `${hours}h ${minutes}m`;
+  if (minutes > 0) return secs > 0 ? `${minutes}m ${secs}s` : `${minutes}m`;
+  return `${secs}s`;
+}
+
+export function formatMilliseconds(ms: number): string {
+  if (!Number.isFinite(ms) || ms <= 0) return "—";
+  if (ms < 1000) return `${Math.round(ms)}ms`;
+  return `${(ms / 1000).toFixed(1)}s`;
+}
+
+/**
+ * Bucket a day's tokens into one of five heatmap intensities (0 = empty).
+ * Thresholds are relative to the busiest day so any usage scale looks alive.
+ */
+export function heatLevel(tokens: number, peak: number): 0 | 1 | 2 | 3 | 4 {
+  if (tokens <= 0) return 0;
+  if (peak <= 0) return 1;
+  const ratio = tokens / peak;
+  if (ratio > 0.6) return 4;
+  if (ratio > 0.3) return 3;
+  if (ratio > 0.1) return 2;
+  return 1;
+}
+
+/** Local YYYY-MM-DD, matching the backend's day keys (which use local time). */
+export function toLocalDayKey(date: Date): string {
+  const year = date.getFullYear();
+  const month = `${date.getMonth() + 1}`.padStart(2, "0");
+  const day = `${date.getDate()}`.padStart(2, "0");
+  return `${year}-${month}-${day}`;
+}
+
+/** Parse a backend day key as a local date (not UTC, which would shift a day). */
+export function parseDayKey(key: string): Date {
+  const [year, month, day] = key.split("-").map(Number);
+  return new Date(year, (month ?? 1) - 1, day ?? 1);
+}
+
+export type ActivityMode = "daily" | "weekly" | "cumulative";
+
+/**
+ * Recast the dense daily series for the selected mode. Weekly sums each
+ * calendar week onto its days so the grid shows week-level intensity;
+ * cumulative is the running total across the displayed window, not lifetime,
+ * since the backend caps the series and seeding it with everything older would
+ * flatten every bar against a baseline the grid cannot show.
+ */
+/**
+ * What to subtract from a cumulative series once the grid drops older days.
+ * Without it the first visible bar opens at the hidden total and the whole
+ * window flattens against a baseline the user cannot see.
+ */
+export function windowBaseline(
+  values: number[],
+  start: number,
+  mode: ActivityMode,
+): number {
+  if (mode !== "cumulative" || start <= 0) return 0;
+  return values[start - 1] ?? 0;
+}
+
+export function seriesForMode(
+  daily: Array<{ date: string; tokens: number }>,
+  mode: ActivityMode,
+): number[] {
+  if (mode === "daily") return daily.map((day) => day.tokens);
+
+  if (mode === "cumulative") {
+    let running = 0;
+    return daily.map((day) => {
+      running += day.tokens;
+      return running;
+    });
+  }
+
+  // Weekly: every day carries the total of the Monday-started week it sits in.
+  const weekTotals: number[] = [];
+  const weekOfDay: number[] = [];
+  let week = -1;
+  for (const [index, day] of daily.entries()) {
+    const isMonday = parseDayKey(day.date).getDay() === 1;
+    if (index === 0 || isMonday) {
+      week += 1;
+      weekTotals[week] = 0;
+    }
+    weekTotals[week] = (weekTotals[week] ?? 0) + day.tokens;
+    weekOfDay[index] = week;
+  }
+  return weekOfDay.map((weekIndex) => weekTotals[weekIndex] ?? 0);
+}

studio/frontend/src/features/settings/settings-dialog.tsx

@@ -63,7 +63,12 @@ interface TabDef {
 
 const TABS: TabDef[] = [
   { id: "general", labelKey: "settings.tabs.general", icon: Settings02Icon },
-  { id: "profile", labelKey: "settings.tabs.profile", icon: UserIcon },
+  {
+    id: "profile",
+    labelKey: "settings.tabs.profile",
+    icon: UserIcon,
+    badgeKey: "common.new",
+  },
   {
     id: "appearance",
     labelKey: "settings.tabs.appearance",

studio/frontend/src/features/settings/settings-search.ts

@@ -37,8 +37,8 @@ export const SETTINGS_SEARCH_INDEX: Record<SettingsTab, TranslationKey[]> = {
     "settings.profile.description",
     "settings.profile.displayName",
     "settings.profile.nickname",
-    "settings.profile.avatarShape",
-    "settings.profile.greetingSloth",
+    // avatarShape lives inside the avatar edit popover, so it has no
+    // always-rendered label for search to scroll to.
   ],
   appearance: [
     "settings.appearance.theme.label",
@@ -81,6 +81,7 @@ export const SETTINGS_SEARCH_INDEX: Record<SettingsTab, TranslationKey[]> = {
   chat: [
     "settings.general.chatDefaults",
     "settings.general.autoTitleNewChats",
+    "settings.profile.greetingSloth",
     "settings.chat.artifacts.title",
     "settings.chat.artifacts.collapseHtmlBlocks",
     "settings.chat.artifacts.allowNetworkAccess",

studio/frontend/src/features/settings/tabs/chat-tab.tsx

@@ -8,6 +8,7 @@ import {
   useChatRuntimeStore,
   usePlusMenuPrefsStore,
 } from "@/features/chat";
+import { useUserProfileStore } from "@/features/profile";
 import { useT } from "@/i18n";
 import {
   Bookmark02Icon,
@@ -126,6 +127,10 @@ export function ChatTab() {
   const togglePlusPin = usePlusMenuPrefsStore((state) => state.togglePin);
   const autoTitle = useChatRuntimeStore((state) => state.autoTitle);
   const setAutoTitle = useChatRuntimeStore((state) => state.setAutoTitle);
+  const showGreetingSloth = useUserProfileStore((s) => s.showGreetingSloth);
+  const setShowGreetingSloth = useUserProfileStore(
+    (s) => s.setShowGreetingSloth,
+  );
   const showCanvasMenuItem = useChatRuntimeStore(
     (state) => state.showCanvasMenuItem,
   );
@@ -276,6 +281,16 @@ export function ChatTab() {
         >
           <Switch checked={autoTitle} onCheckedChange={setAutoTitle} />
         </SettingsRow>
+        <SettingsRow
+          label={t("settings.profile.greetingSloth")}
+          description={t("settings.profile.greetingSlothDescription")}
+        >
+          <Switch
+            id="profile-greeting-sloth"
+            checked={showGreetingSloth}
+            onCheckedChange={setShowGreetingSloth}
+          />
+        </SettingsRow>
       </SettingsSection>
 
       <SettingsSection title={t("settings.chat.artifacts.title")}>

studio/frontend/src/features/settings/tabs/profile-tab.tsx

@@ -1,7 +1,10 @@
 // SPDX-License-Identifier: AGPL-3.0-only
 // Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
 
-import { ProfilePersonalizationPanel } from "@/features/profile";
+import {
+  ProfilePersonalizationPanel,
+  ProfileStatsPanel,
+} from "@/features/profile";
 import { useT } from "@/i18n";
 
 export function ProfileTab() {
@@ -25,6 +28,7 @@ export function ProfileTab() {
       </header>
 
       <ProfilePersonalizationPanel />
+      <ProfileStatsPanel />
     </div>
   );
 }

studio/frontend/src/i18n/locales/en.ts

@@ -383,16 +383,19 @@ export const en = {
       title: "Profile",
       description: "How your profile appears in Unsloth.",
       changePicture: "Change profile picture",
+      uploadPhoto: "Upload photo",
+      removePhoto: "Remove",
+      pictureOptions: "Profile picture options",
       displayName: "Display name",
       nickname: "What should Unsloth call you?",
       nicknamePlaceholder: "Nickname",
       nicknameSaved: "Preferred name saved",
-      avatarShape: "Profile picture shape",
+      avatarShape: "Avatar shape",
       avatarShapeCircle: "Circle",
       avatarShapeRounded: "Rounded",
       greetingSloth: "Sloth in greeting",
       greetingSlothDescription: "Show the sloth in the chat greeting.",
-      chooseSloth: "Or pick a sloth profile picture",
+      chooseSloth: "Or pick a sloth",
       noPicture: "No profile picture",
       noneLabel: "None",
       nameSaved: "Profile name saved",
@@ -405,6 +408,64 @@ export const en = {
         "Photo updated for this session, but may not persist after reload.",
       photoUpdateErrorTitle: "Could not update profile photo",
       imageUseError: "Could not use this image.",
+      stats: {
+        title: "Your stats",
+        subtitle:
+          "Everything below is counted from your own history. Nothing is collected or sent to Unsloth.",
+        retry: "Try again",
+        privacyNote:
+          "Stats are computed from the chat and training history held by your Unsloth install. Nothing is collected, and nothing is sent to Unsloth or any third party.",
+        emptyChats:
+          "No chats yet. Start a conversation and your stats will fill in here.",
+        lifetimeTokens: "Lifetime tokens",
+        peakTokens: "Peak day",
+        longestChat: "Longest chat",
+        currentStreak: "Current streak",
+        longestStreak: "Longest streak",
+        dayCount: "{count} days",
+        dayCountOne: "1 day",
+        activityTitle: "Token activity",
+        activityDescription: "{total} tokens over the last {weeks} weeks",
+        mode: {
+          daily: "Daily",
+          weekly: "Weekly",
+          cumulative: "Cumulative",
+        },
+        cellTooltip: "{date} · {tokens} tokens, {messages} messages",
+        weekTooltip: "Week of {date} · {tokens} tokens",
+        less: "Less",
+        more: "More",
+        insightsTitle: "Activity insights",
+        totalChats: "Total chats",
+        totalMessages: "Total messages",
+        tokensIn: "Tokens sent",
+        tokensOut: "Tokens generated",
+        cachedTokens: "Cached tokens",
+        cachedValue: "{tokens} ({percent}% of input)",
+        avgTokensPerChat: "Average tokens per chat",
+        timeInChat: "Time in chat",
+        activeDays: "Active days",
+        toolCalls: "Tool calls",
+        attachments: "Files attached",
+        avgSpeed: "Average speed",
+        bestSpeed: "Fastest response",
+        firstToken: "Average time to first token",
+        tokensPerSecond: "{value} tok/s",
+        topModelsTitle: "Most used models",
+        topModelsDescription: "Ranked by tokens exchanged",
+        modelSummary: "{tokens} · {messages} msgs",
+        noModels: "No model usage recorded yet.",
+        trainingTitle: "Training",
+        trainingDescription: "Fine-tuning runs from this workspace",
+        trainingRuns: "Runs",
+        trainingCompleted: "Completed",
+        trainingSteps: "Steps",
+        trainingTokens: "Tokens trained",
+        trainingTime: "Training time",
+        bestLoss: "Best loss",
+        runSteps: "{steps} steps",
+        runLoss: "loss {loss}",
+      },
     },
     appearance: {
       title: "Appearance",

studio/frontend/tests/profile-stats-format.test.ts

@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+// Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
+
+import assert from "node:assert/strict";
+import test from "node:test";
+
+import {
+  formatCompactNumber,
+  formatDuration,
+  formatMilliseconds,
+  heatLevel,
+  parseDayKey,
+  seriesForMode,
+  windowBaseline,
+} from "../src/features/profile/utils/stats-format.ts";
+
+test("compact numbers match the tile format", () => {
+  assert.equal(formatCompactNumber(0), "0");
+  assert.equal(formatCompactNumber(999), "999");
+  assert.equal(formatCompactNumber(1000), "1K");
+  assert.equal(formatCompactNumber(12_340), "12.3K");
+  assert.equal(formatCompactNumber(1_900_000_000), "1.9B");
+  assert.equal(formatCompactNumber(19_800_000_000), "19.8B");
+  // Past 100 of a unit the decimal is noise.
+  assert.equal(formatCompactNumber(123_400), "123K");
+  assert.equal(formatCompactNumber(Number.NaN), "0");
+});
+
+test("rounding up a unit steps to the next suffix", () => {
+  // Rounding 999.5K to "1000K" is four digits, which is not compact.
+  assert.equal(formatCompactNumber(999_999), "1M");
+  assert.equal(formatCompactNumber(999_500), "1M");
+  assert.equal(formatCompactNumber(999_999_999), "1B");
+  assert.equal(formatCompactNumber(999_999_999_999), "1T");
+  assert.equal(formatCompactNumber(-999_999), "-1M");
+  // Just below the rounding boundary the unit is unchanged.
+  assert.equal(formatCompactNumber(999_499), "999K");
+});
+
+test("durations read the way the header does", () => {
+  assert.equal(formatDuration(0), "0m");
+  assert.equal(formatDuration(45), "45s");
+  assert.equal(formatDuration(90), "1m 30s");
+  assert.equal(formatDuration(14_880), "4h 8m");
+  assert.equal(formatDuration(180_000), "2d 2h");
+  assert.equal(formatMilliseconds(420), "420ms");
+  assert.equal(formatMilliseconds(2500), "2.5s");
+  assert.equal(formatMilliseconds(0), "—");
+});
+
+test("heat levels are relative to the busiest day", () => {
+  assert.equal(heatLevel(0, 1000), 0);
+  assert.equal(heatLevel(50, 1000), 1);
+  assert.equal(heatLevel(200, 1000), 2);
+  assert.equal(heatLevel(400, 1000), 3);
+  assert.equal(heatLevel(1000, 1000), 4);
+  // A single active day with no other history still shows up.
+  assert.equal(heatLevel(5, 0), 1);
+});
+
+test("day keys parse as local dates, not UTC", () => {
+  const parsed = parseDayKey("2026-03-09");
+  assert.equal(parsed.getFullYear(), 2026);
+  assert.equal(parsed.getMonth(), 2);
+  assert.equal(parsed.getDate(), 9);
+});
+
+test("series modes reshape the same daily data", () => {
+  // 2026-03-02 is a Monday, so this spans exactly two calendar weeks.
+  const daily = [
+    { date: "2026-03-02", tokens: 10 },
+    { date: "2026-03-03", tokens: 20 },
+    { date: "2026-03-08", tokens: 5 },
+    { date: "2026-03-09", tokens: 100 },
+  ];
+
+  assert.deepEqual(seriesForMode(daily, "daily"), [10, 20, 5, 100]);
+  assert.deepEqual(seriesForMode(daily, "cumulative"), [10, 30, 35, 135]);
+  // First three days are in the week of Mar 2 (35), Mar 9 starts a new week.
+  assert.deepEqual(seriesForMode(daily, "weekly"), [35, 35, 35, 100]);
+  assert.deepEqual(seriesForMode([], "weekly"), []);
+});
+
+test("a trimmed cumulative window rebases off the last hidden day", () => {
+  const daily = [
+    { date: "2026-01-01", tokens: 1000 },
+    { date: "2026-01-02", tokens: 2000 },
+    { date: "2026-01-03", tokens: 5 },
+    { date: "2026-01-04", tokens: 10 },
+  ];
+  const values = seriesForMode(daily, "cumulative");
+  assert.deepEqual(values, [1000, 3000, 3005, 3015]);
+
+  // Showing only the last two days: without rebasing, both bars sit at ~3000
+  // and the 5 vs 10 difference is invisible.
+  const baseline = windowBaseline(values, 2, "cumulative");
+  assert.equal(baseline, 3000);
+  assert.deepEqual(
+    values.slice(2).map((value) => value - baseline),
+    [5, 15],
+  );
+});
+
+test("nothing is rebased when the window shows everything", () => {
+  const values = [1, 3, 6];
+  assert.equal(windowBaseline(values, 0, "cumulative"), 0);
+});
+
+test("only cumulative rebases: daily and weekly are already per-window", () => {
+  const values = [10, 20, 5];
+  assert.equal(windowBaseline(values, 2, "daily"), 0);
+  assert.equal(windowBaseline(values, 2, "weekly"), 0);
+});