feat(coder): unified Plan/Ask/Bypass permission picker

Replace the raw per-agent mode dropdown in the BooCoder composer with a
curated three-option permission ladder mapped generically onto each
provider's native modes: `plan` id -> Plan, default -> Ask, isUnattended
-> Bypass (claude bypassPermissions, qwen yolo, opencode full-access).
modeId stays the single wire field; the active unified mode is derived
from it (no contracts change).

Native BooCode gains its own mode set: Ask stages to the pending-changes
queue (today's behavior), Bypass auto-applies the queue to disk after the
turn (interactive messages path + task dispatcher path), Plan falls back
to Ask. The shared apps/server inference engine is left untouched.

Also preserve isUnattended on live-probed ACP modes so opencode's bypass
mode stays detectable from the wire.

Coder 373 tests green; coder + web typecheck clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/coder/src/services/provider-manifest.ts

@@ -32,6 +32,18 @@ const QWEN_PTY_MODES: ProviderMode[] = [
   { id: 'yolo', label: 'YOLO', description: 'Auto-approve all tools', isUnattended: true },
 ];
 
+// Native BooCode (llama-swap) has no agent-native mode vocabulary, so we define
+// one that matches the unified permission ladder. `bypass` is the only mode that
+// changes behavior (auto-apply staged edits after the turn — dispatcher.ts);
+// `plan` falls back to `ask` semantics for native (writes still stage to the
+// pending-changes queue). External agents map the same three unified modes onto
+// THEIR native ids via the `plan`-id / default / `isUnattended` shape.
+const BOOCODE_MODES: ProviderMode[] = [
+  { id: 'plan', label: 'Plan', description: 'Read-only analysis (native BooCode falls back to Ask)' },
+  { id: 'ask', label: 'Ask Permission', description: 'Stage edits to the pending-changes queue for review' },
+  { id: 'bypass', label: 'Bypass', description: 'Auto-apply edits to disk after the turn', isUnattended: true },
+];
+
 const CLAUDE_THINKING = [
   { id: 'low', label: 'Low' },
   { id: 'medium', label: 'Medium' },
@@ -41,6 +53,10 @@ const CLAUDE_THINKING = [
 ];
 
 export const PROVIDER_MANIFEST: Record<string, ProviderManifestEntry> = {
+  boocode: {
+    defaultModeId: 'ask',
+    modes: BOOCODE_MODES,
+  },
   claude: {
     defaultModeId: 'default',
     modes: CLAUDE_MODES,