Replace standalone Studio wording with Unsloth (#7221)

* Replace standalone Studio wording with Unsloth

Replace the single word Studio with Unsloth wherever it is used as
shorthand for Unsloth Studio in docs, CLI output, UI strings, i18n
locales, workflow display names, comments and docstrings.

Kept unchanged: the full name Unsloth Studio, third party product
names (LM Studio, Visual Studio, Mac Studio), feature names
(Recipe Studio, Fine-tuning Studio and its translations), and all
identifiers such as env vars, commands, paths and filenames.

* Address review feedback on the Studio wording rename

Use "an" before Unsloth where the rename left the article as "a".
Restore the split brand where Unsloth and Studio render as two halves
of the full product name: the onboarding sidebar subtitle and the
IPv6 localhost warning. Scope two messages to the full name Unsloth
Studio where plain Unsloth was misleading: the AMD README bullet and
the CLI studio setup error.

.github/scripts/agent-guides-drive.sh

@@ -166,8 +166,8 @@ parse_connect() {
   echo "[$AGENT] connect --no-launch printed:"; cat_redacted "$raw"
   CONNECT_ENV="$(grep -E '^(export |unset )' "$raw" || true)"
   # The launch command is the last non-export, non-status line. start.py
-  # prints "Studio <url> · model <id>" and "Updated ..." status lines first.
-  CONNECT_CMD="$(grep -vE '^(export |unset |Studio |Updated |Disabled |Warning|Loading)' "$raw" \
+  # prints "Unsloth <url> · model <id>" and "Updated ..." status lines first.
+  CONNECT_CMD="$(grep -vE '^(export |unset |Unsloth |Updated |Disabled |Warning|Loading)' "$raw" \
     | grep -E '[^[:space:]]' | tail -1)"
   [ -n "$CONNECT_CMD" ] || guide_fail "could not parse a launch command from connect --no-launch output"
   redact "$raw"

.github/scripts/assert-llama-loads.sh

@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 # Copyright 2026-present the Unsloth AI Inc. team. All rights reserved.
 #
-# Assert Studio installed a llama.cpp that loads and runs on THIS macOS. Tests
+# Assert Unsloth installed a llama.cpp that loads and runs on THIS macOS. Tests
 # the contract that matters (binaries load and their minimum-OS is <= this host)
 # instead of the old "did install.sh fall back to a source build?" grep, since a
 # source build with a correct deployment target is a valid outcome.

.github/scripts/assert-prompt-cache.sh

@@ -31,7 +31,7 @@
 #   (llama_cpp.py:337-340). So default: ~/.unsloth/studio/logs/llama-server/.
 #
 #   <P> is the INTERNAL llama-server port (self._find_free_port(),
-#   llama_cpp.py:3489 / :4641) -- a RANDOM port, NOT the Studio port. So we must
+#   llama_cpp.py:3489 / :4641) -- a RANDOM port, NOT the Unsloth port. So we must
 #   NOT filter the log glob by STUDIO_PORT (the brief's `port-<STUDIO_PORT>`
 #   glob would never match). We pick the newest llama-*.log instead.
 #

.github/scripts/hf-download-with-retry.sh

@@ -3,7 +3,7 @@
 # Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
 #
 # Download a single file from a Hugging Face repo with a stall-retry
-# watchdog. Used by the Studio CI workflows so a hung hf-xet transfer
+# watchdog. Used by the Unsloth CI workflows so a hung hf-xet transfer
 # kills + retries instead of silently consuming the job's timeout.
 #
 # Usage: hf-download-with-retry.sh REPO FILE LOCAL_DIR
@@ -35,7 +35,7 @@ REPO="${1:?usage: hf-download-with-retry.sh REPO FILE [LOCAL_DIR]}"
 FILE="${2:?usage: hf-download-with-retry.sh REPO FILE [LOCAL_DIR]}"
 # LOCAL_DIR is optional. If empty, hf falls back to HF_HUB_CACHE
 # (~/.cache/huggingface/hub) which is the desired path for callers
-# that populate HF_HOME for a downstream Studio model load.
+# that populate HF_HOME for a downstream Unsloth model load.
 LOCAL_DIR="${3:-}"
 
 # Stall threshold per attempt, in seconds. Override with