docs(marketing): v0.3.5 changelog and announcement

apps/marketing/src/content/changelog/v0.3.5.md

@@ -0,0 +1,55 @@
+---
+version: 0.3.5
+date: 2026-08-22
+title: Skills, worktree cleanup, and startup recovery
+summary: Create and manage workspace skills in settings and the composer, clean up unused git worktrees, track background agent work more reliably, and get a real error dialog when the app cannot start.
+githubRelease: https://github.com/Threadlines/threadlines/releases/tag/v0.3.5
+highlights:
+  - title: Manage skills across your workspace
+    description: Skills now live in Plugins & Skills settings where you can create, delete, and toggle them on and off. They also appear when typing / in the composer, rendering as editable pills so you can pick and modify them inline.
+    evidence:
+      - b1c3b958
+      - 0b3ae2d0
+  - title: Clean up unused git worktrees
+    description: The branch menu now shows a count of unused worktrees and opens a dialog to review and delete them. Each checkout displays its branch, uncommitted changes, unshipped commits, and any archived threads still pointing there, so you can see what's safe to remove.
+    evidence:
+      - f0cae00b
+  - title: Background agents and their work stay visible
+    description: Resumed background agents now reappear correctly in the Agents panel and keep running under their original task. Agent-driven browser work remains visible during interactions, and duplicate agent trackers no longer clutter the display.
+    evidence:
+      - b0774a7d
+      - 562f871b
+      - 7bcedfe3
+  - title: Startup failures show a dialog instead of hanging invisibly
+    description: When the backend fails to start, you now see a dialog with recovery options (Try Again, Open Logs Folder, Quit) instead of an invisible loop. Anonymous crash reports capture startup issues so problems in the field become visible.
+    evidence:
+      - 0541074f
+alsoImproved:
+  - description: Context window popout displays a stacked breakdown bar showing what fills the window, plus a cached input rate line for both Claude and Codex sessions.
+    evidence:
+      - 33f5ae41
+  - description: Tab close controls remain usable on touch screens while preserving hover-only behavior on pointer devices.
+    evidence:
+      - b1797e49
+  - description: Focus handling improved during agent-driven page actions so the composer focus returns correctly when agents interact with the browser.
+    evidence:
+      - 4d91e167
+  - description: Message responses now appear as the last row in settled turns instead of being pushed below turn-end bookkeeping.
+    evidence:
+      - "21529338"
+  - description: Streaming performance fixed for formatted text ending with punctuation, so bold like "**done.**" no longer stalls the message flow.
+    evidence:
+      - 2e8dcb76
+  - description: Scrollable whitespace below settled responses is removed to keep the chat view compact.
+    evidence:
+      - 321b1d46
+social: |-
+  Threadlines v0.3.5 is out 🧵
+
+  • Manage workspace skills
+  • Clean up unused git worktrees
+  • Better background task tracking
+  • Startup failures now surface a real error dialog
+
+  Release notes: https://github.com/Threadlines/threadlines/releases/tag/v0.3.5
+---