Task work log, inline writing assistant, task editor sidebar layout

Backend:
- Migration 0021: task_logs table (FK → notes + users, CASCADE, indexed)
- models/task_log.py: SQLAlchemy model with to_dict()
- services/task_logs.py: CRUD with ownership checks, _UNSET sentinel for optional duration clear
- routes/task_logs.py: GET/POST/PATCH/DELETE /api/tasks/<id>/logs
- services/tools.py: log_work LLM tool (resolves task by title, creates log entry)
- services/generation_task.py: retry assist generation up to 3× on HTTP 500

Frontend:
- types/task.ts: TaskLog interface
- TaskLogSection.vue: chronological work log with date+time timestamps, duration badge, inline edit, autofocus
- InlineAssistPanel.vue: streaming preview + diff review rendered inline in editor column
- useAssist.ts: removed chatStore.chatReady gate; toast notifications for errors
- NoteEditorView.vue + TaskEditorView.vue: inline assist panel, aside restricted to idle state
- TaskEditorView.vue: two-column layout (editor+log left, metadata sidebar right), body defaults to Preview, sidebarOpen accordion for mobile
- editor-shared.css: .assist-active-hint style

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/fabledassistant/models/__init__.py

@@ -29,3 +29,4 @@ from fabledassistant.models.project import Project  # noqa: E402, F401
 from fabledassistant.models.push_subscription import PushSubscription  # noqa: E402, F401
 from fabledassistant.models.event import Event  # noqa: E402, F401
 from fabledassistant.models.milestone import Milestone  # noqa: E402, F401
+from fabledassistant.models.task_log import TaskLog  # noqa: E402, F401

src/fabledassistant/models/task_log.py

@@ -0,0 +1,35 @@
+from datetime import datetime, timezone
+
+from sqlalchemy import DateTime, ForeignKey, Integer, Text
+from sqlalchemy.orm import Mapped, mapped_column
+
+from fabledassistant.models import Base
+
+
+class TaskLog(Base):
+    __tablename__ = "task_logs"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    task_id: Mapped[int] = mapped_column(Integer, ForeignKey("notes.id", ondelete="CASCADE"))
+    user_id: Mapped[int] = mapped_column(Integer, ForeignKey("users.id", ondelete="CASCADE"))
+    content: Mapped[str] = mapped_column(Text)
+    duration_minutes: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
+    )
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True),
+        default=lambda: datetime.now(timezone.utc),
+        onupdate=lambda: datetime.now(timezone.utc),
+    )
+
+    def to_dict(self) -> dict:
+        return {
+            "id": self.id,
+            "task_id": self.task_id,
+            "user_id": self.user_id,
+            "content": self.content,
+            "duration_minutes": self.duration_minutes,
+            "created_at": self.created_at.isoformat(),
+            "updated_at": self.updated_at.isoformat(),
+        }