Merge dev into feature/session-handoff

Resolved conflicts:
- Translation files: kept dev's proper localized versions
- prompt/index.tsx: preserved handoff functionality with dev's placeholderText() pattern
- home.tsx: kept dev's simpler layout

packages/sdk/openapi.json

@@ -6495,6 +6495,9 @@
           "tokens": {
             "type": "object",
             "properties": {
+              "total": {
+                "type": "number"
+              },
               "input": {
                 "type": "number"
               },
@@ -7125,6 +7128,9 @@
           "tokens": {
             "type": "object",
             "properties": {
+              "total": {
+                "type": "number"
+              },
               "input": {
                 "type": "number"
               },
@@ -9996,6 +10002,12 @@
               "prune": {
                 "description": "Enable pruning of old tool outputs (default: true)",
                 "type": "boolean"
+              },
+              "reserved": {
+                "description": "Token buffer for compaction. Leaves enough window to avoid overflow during compaction.",
+                "type": "integer",
+                "minimum": 0,
+                "maximum": 9007199254740991
               }
             }
           },