feat: improve VS Code dev flow and stabilize sidebar/chat behavior (#754)

* fix: improve session sidebar tooltip and truncation behavior

- Keep new-draft tooltip anchored to its trigger button
- Fix minimal-mode worktree/group header text truncation
- Tune minimal-mode right padding to reduce early label clipping

* fix: render reasoning through markdown pipeline

- Use Streamdown rendering for reasoning in live chat mode
- Remove italic styling from reasoning text
- Render expanded reasoning content with MarkdownRenderer

* chore: remove legacy electron dependencies

- Removed unused Electron packages from root and UI manifests
- Deleted obsolete Electron context menu type declaration
- Regenerated lockfile after dependency cleanup

* fix: handle non-repository folders in git status API

- Prevent 500 errors when status is requested outside a valid Git repo
- Improve repository detection using `git rev-parse --git-dir`
- Reduce noisy server logs for expected non-repo status checks

* fix unloaded session chat layout flicker

* fix: reduce noisy TTS status polling

Cache and dedupe TTS status requests, and only check provider availability when the related voice features are enabled so disabled voice setups stay quiet.

* perf: throttle background PR git status refreshes

* fix: improve VS Code Explorer file drop mentions in chat

- Add Explorer context action to insert selected files as @mentions.
- Handle Explorer drag-and-drop to prefill @file mentions instead of attachments.
- Prevent duplicate plain-path text when dropping multiple files.

* fix: deduplicate recent sessions in VS Code sidebar

- Hide sessions from main list when already shown in recent
- Apply dedup only in VS Code runtime
- Keep session search behavior unchanged

* feat: add true HMR dev flow for VS Code extension

- Load VS Code webview from Vite dev server with React refresh preamble
- Add `vscode:dev` runner that starts watchers and opens Extension Development Host
- Update VS Code dev docs and scripts to use the new HMR startup flow

* feat: polish VS Code session sidebar and attachment UX

- Add resizable sessions sidebar in VS Code layout
- Tighten session list spacing and hover behavior in VS Code
- Remove bulk file/image attach success toasts while keeping error toasts

packages/ui/src/components/session/sidebar/SidebarProjectsList.tsx

@@ -38,7 +38,7 @@ type Props = {
   hasSessionSearchQuery: boolean;
   emptyState: React.ReactNode;
   searchEmptyState: React.ReactNode;
-  renderGroupSessions: (group: SessionGroup, groupKey: string, projectId?: string | null, hideGroupLabel?: boolean, dragHandleProps?: SortableDragHandleProps | null) => React.ReactNode;
+  renderGroupSessions: (group: SessionGroup, groupKey: string, projectId?: string | null, hideGroupLabel?: boolean, dragHandleProps?: SortableDragHandleProps | null, compactBodyPadding?: boolean) => React.ReactNode;
   homeDirectory: string | null;
   collapsedProjects: Set<string>;
   hideDirectoryControls: boolean;
@@ -111,7 +111,7 @@ export function SidebarProjectsList(props: Props): React.ReactNode {
               const hideGroupLabel = group.id === primaryGroup.id;
               return (
                 <React.Fragment key={groupKey}>
-                  {props.renderGroupSessions(group, groupKey, activeSection.project.id, hideGroupLabel)}
+                  {props.renderGroupSessions(group, groupKey, activeSection.project.id, hideGroupLabel, null, true)}
                 </React.Fragment>
               );
             });