feat(electrobun): groups, cloning, shortcuts, custom window — all 5 features

Groups Sidebar:
- SQLite groups table (4 seeded: Development, Testing, DevOps, Research)
- Left icon rail with emoji group icons, Ctrl+1-4 switching
- Active group highlighted, projects filtered by group

Project Cloning:
- Clone button on project cards (fork icon)
- git worktree add via Bun.spawn (array form, no shell strings)
- 3-clone limit, branch name validation, pending-status pattern
- Clone cards: WT badge + branch name + accent top border
- Chain link SVG icons between linked clones in grid

Keyboard Shortcuts:
- keybinding-store.svelte.ts: 16 defaults across 4 categories
- Two-scope: document capture + terminal focus guard
- KeyboardSettings.svelte: search, click-to-capture, conflict detection
- Per-binding reset + Reset All

Custom Window:
- titleBarStyle: "hidden" — no native title bar
- Vertical "AGOR" text in left sidebar (writing-mode: vertical-rl)
- Floating window controls badge (minimize/maximize/close)
- Draggable region via -webkit-app-region: drag
- Window frame persisted to SQLite (debounced 500ms)

Window is resizable by default (Electrobun BrowserWindow).

ui-electrobun/src/bun/settings-db.ts

@@ -39,6 +39,26 @@ CREATE TABLE IF NOT EXISTS custom_themes (
   name    TEXT NOT NULL,
   palette TEXT NOT NULL  -- JSON blob
 );
+
+CREATE TABLE IF NOT EXISTS groups (
+  id       TEXT PRIMARY KEY,
+  name     TEXT NOT NULL,
+  icon     TEXT NOT NULL,
+  position INTEGER NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS keybindings (
+  id    TEXT PRIMARY KEY,
+  chord TEXT NOT NULL
+);
+`;
+
+// Seed default groups (idempotent via INSERT OR IGNORE)
+const SEED_GROUPS = `
+INSERT OR IGNORE INTO groups VALUES ('dev',      'Development', '🔧', 0);
+INSERT OR IGNORE INTO groups VALUES ('test',     'Testing',     '🧪', 1);
+INSERT OR IGNORE INTO groups VALUES ('ops',      'DevOps',      '🚀', 2);
+INSERT OR IGNORE INTO groups VALUES ('research', 'Research',    '🔬', 3);
 `;
 
 // ── SettingsDb class ─────────────────────────────────────────────────────────
@@ -51,6 +71,18 @@ export interface ProjectConfig {
   provider?: string;
   profile?: string;
   model?: string;
+  /** Group this project belongs to. Defaults to 'dev'. */
+  groupId?: string;
+  /** For clones: path of the source repo (worktree parent). */
+  mainRepoPath?: string;
+  /** For clones: ID of the original project this was cloned from. */
+  cloneOf?: string;
+  /** For clones: absolute path to the git worktree. */
+  worktreePath?: string;
+  /** For clones: branch name checked out in the worktree. */
+  worktreeBranch?: string;
+  /** 1-indexed clone number within the parent (1–3). */
+  cloneIndex?: number;
   [key: string]: unknown;
 }
 
@@ -60,6 +92,13 @@ export interface CustomTheme {
   palette: Record<string, string>;
 }
 
+export interface Group {
+  id: string;
+  name: string;
+  icon: string;
+  position: number;
+}
+
 export class SettingsDb {
   private db: Database;
 
@@ -69,6 +108,7 @@ export class SettingsDb {
 
     this.db = new Database(DB_PATH);
     this.db.exec(SCHEMA);
+    this.db.exec(SEED_GROUPS);
 
     // Seed schema_version row if missing
     const version = this.db
@@ -136,6 +176,14 @@ export class SettingsDb {
     });
   }
 
+  // ── Groups ─────────────────────────────────────────────────────────────────
+
+  listGroups(): Group[] {
+    return this.db
+      .query<Group, []>("SELECT id, name, icon, position FROM groups ORDER BY position ASC")
+      .all();
+  }
+
   // ── Custom Themes ─────────────────────────────────────────────────────────
 
   getCustomThemes(): CustomTheme[] {
@@ -166,6 +214,25 @@ export class SettingsDb {
     this.db.query("DELETE FROM custom_themes WHERE id = ?").run(id);
   }
 
+  // ── Keybindings ───────────────────────────────────────────────────────────
+
+  getKeybindings(): Record<string, string> {
+    const rows = this.db
+      .query<{ id: string; chord: string }, []>("SELECT id, chord FROM keybindings")
+      .all();
+    return Object.fromEntries(rows.map((r) => [r.id, r.chord]));
+  }
+
+  setKeybinding(id: string, chord: string): void {
+    this.db
+      .query("INSERT INTO keybindings (id, chord) VALUES (?, ?) ON CONFLICT(id) DO UPDATE SET chord = excluded.chord")
+      .run(id, chord);
+  }
+
+  deleteKeybinding(id: string): void {
+    this.db.query("DELETE FROM keybindings WHERE id = ?").run(id);
+  }
+
   // ── Lifecycle ─────────────────────────────────────────────────────────────
 
   close(): void {