feat(changelog): one source file per release, generated outputs

Release notes now live in changelog/<version>.md (front matter with
version and date, then ## App and ## VS Code sections grouped into
New, Improvements, Fixes, Misc) plus changelog/unreleased.md for what
has not shipped. `bun run changelog:build` renders CHANGELOG.md,
packages/vscode/CHANGELOG.md, and changelog/index.json from them;
`changelog:check` fails when the outputs are behind and runs in CI and
in release:prepare. `oc-dev create-release` promotes unreleased.md to
the versioned file dated today and rebuilds.

The existing history was split mechanically: every bullet kept, sorted
into groups by keyword, five hand-typed headers with one-digit days
normalised to YYYY-MM-DD (the update dialog matched none of them). The
generated files keep today's release headers, which the update dialog,
the release workflow, and the website match by regex.

Claude-Session: https://claude.ai/code/session_01VqV56Hez25hTxXH4ipJfzH

changelog/1.17.0.md

@@ -0,0 +1,50 @@
+---
+version: 1.17.0
+date: 2026-07-28
+---
+
+## App
+
+### New
+- **Agents/CLI:** agents on managed local instances can now create, send to, fork, inspect, and wait for sessions; create isolated worktrees; and manage scheduled tasks through the OpenChamber tool. The CLI adds matching `session`, `schedule`, `projects`, and `models` commands, and a new Schedule a Task starter guides task setup from chat.
+- Chat: selecting text from Markdown code blocks now preserves the code fences, language, and surrounding block structure when adding it to the composer or starting a new session (thanks to @ChangeHow).
+- Settings: added an option to hide starter suggestions on the new-session screen.
+- Usage: added Crof and NeuralWatt quota tracking with subscription kWh, independent key-allowance windows, and credits-balance fallback across the web server and VS Code extension (thanks to @kydorn).
+
+### Improvements
+- **Sidebar:** sessions are organized into Recent and project zones with worktree-grouped or flat views. Scheduled tasks, archived sessions, multi-run, and worktree management now open as full-page views from the sidebar.
+- Chat composer: prompts now render Markdown emphasis, attention lines, file and agent mentions, slash commands, snippets, attachment citations, and `~path` references directly while you type. File mentions can be edited in place, and the mobile composer grows with its content instead of using a separate fullscreen gesture.
+- Chat/Permissions: sending a message while a permission prompt is open now denies pending requests in the session and its subagents, then queues the message for the next turn (thanks to @tomzx).
+- Chat/Subagents: subagent chats can be prompted when direct subagent prompting is enabled, even if the parent session has not loaded.
+- Chat: jumping to messages in long conversations now lands on the intended message when earlier rows have not been rendered yet.
+- Mobile/iOS: push notifications now use Apple’s production service by default (thanks to @natheihei).
+- Mobile/iOS: notifications now work for development builds installed from Xcode — the app detects its Apple push environment and the server delivers each device to the matching endpoint, so dev (sandbox) and TestFlight/App Store (production) installs both receive pushes.
+
+### Fixes
+- **Context panel:** a new surface rail brings Changes, pull requests, files, terminal, notes, plans, previews, and side chats into one resizable panel. The pull-request surface now shows live checks and comments, and can attach failed checks or comments to a chat draft.
+- **Desktop/Linux:** official AppImage releases for x64 and arm64, with in-app updates, frameless window controls, system tray minimize, launch at login, multi-window support, and “Open in” for discovered installed apps. Missing update manifests are treated as “no update” instead of a hard failure, and updater errors surface in About/sidebar (thanks to @BestSithInEU, @jibanez-staticduo, @makeittech).
+- Desktop/Linux: fixed an intermittent freeze or crash while chats were streaming with the system tray enabled (thanks to @kydorn).
+- Small Model: GitHub Copilot models now use their supported API, fixing summaries, goal audits, commit messages, and other Small Model actions for models that do not support Chat Completions (thanks to @jakoss).
+- Chat: code blocks no longer shift line layout or merge adjacent text while rendering, and copied code keeps its original text (thanks to @ChangeHow).
+- Mobile/Android: terminal taps now open the keyboard, text and backspace input work with Android keyboards, and closing a focused terminal no longer leaves the app unresponsive.
+- Shortcuts: fixed a regression where double-Escape could be primed when the current session was not active.
+
+## VS Code
+
+### New
+- Chat: selecting text from Markdown code blocks now preserves the code fences, language, and surrounding block structure when adding it to the composer or starting a new session (thanks to @ChangeHow).
+- Settings: added an option to hide starter suggestions on the new-session screen.
+
+### Improvements
+- **Chat composer:** prompts now render Markdown emphasis, attention lines, file and agent mentions, slash commands, snippets, attachment citations, and `~path` references directly while you type. File mentions can be edited in place.
+- Sessions: the sidebar now uses clearer project zones and single-line session rows, with folders shown after ungrouped sessions and archived sessions kept in their existing workspace sections.
+- Chat/Permissions: sending a message while a permission prompt is open now denies pending requests in the session and its subagents, then queues the message for the next turn (thanks to @tomzx).
+- Chat/Subagents: subagent chats can be prompted when direct subagent prompting is enabled, even if the parent session has not loaded.
+- Chat: jumping to messages in long conversations now lands on the intended message when earlier rows have not been rendered yet.
+
+### Fixes
+- **Context panel:** a new surface rail brings Changes, pull requests, files, terminal, notes, plans, previews, and side chats into one resizable panel. The pull-request surface now shows live checks and comments, and can attach failed checks or comments to a chat draft.
+- Sessions: fixed missing activity-based sorting; chats now move in the list when they start or finish instead of repeatedly reordering while a response streams.
+- Chat: code blocks no longer shift line layout or merge adjacent text while rendering, and copied code keeps its original text (thanks to @ChangeHow).
+- Shortcuts: fixed a regression where double-Escape could be primed when the current session was not active.
+- Usage: added Crof and NeuralWatt quota tracking, including the missing Crof switch arm that previously fell back to "Unsupported provider" (thanks to @kydorn).