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-snapshot.ts

@@ -122,12 +122,14 @@ async function buildProviderEntry(
     };
   }
 
-  // 2. Native boocode → always ready (llama-swap models).
+  // 2. Native boocode → always ready (llama-swap models). Exposes the unified
+  // permission modes (plan/ask/bypass) so the composer's permission picker works
+  // for native BooCode too; `bypass` auto-applies staged edits (dispatcher.ts).
   if (isNative) {
     return {
       name, label: resolved.label, transport, status: 'ready',
-      enabled: true, installed: true, models: withConfigModels(llamaModels), modes: [],
-      defaultModeId: null, commands: manifestCommands,
+      enabled: true, installed: true, models: withConfigModels(llamaModels),
+      modes: fallbackModes, defaultModeId, commands: manifestCommands,
     };
   }