Merge branch 'main' into dev

Surgical merge of 74 commits from main into dev. Key features ported:

- Provider visibility gating (appVersion filtering for Pi/Copilot)
- Pi agent provider + Copilot re-enabled
- Provider-declared features system (Codex fast mode)
- Workspace dedup by worktree root (adapted to integer IDs)
- Bulk close archiving fix for stored agents
- Agent creation timeout increase to 60s
- Audio/voice crash fixes (external buffer copies)
- Multi-host setup fix
- Reload agent tab action

Dev architecture preserved: SQLite storage, service proxy,
workspace setup dialog, hover cards, removed launcher tabs.

packages/app/src/components/provider-icons.ts

@@ -6,16 +6,17 @@ import { CodexIcon } from "@/components/icons/codex-icon";
 import { GeminiIcon } from "@/components/icons/gemini-icon";
 import { CopilotIcon } from "@/components/icons/copilot-icon";
 import { OpenCodeIcon } from "@/components/icons/opencode-icon";
+import { PiIcon } from "@/components/icons/pi-icon";
 
 const PROVIDER_ICONS: Record<string, typeof Bot> = {
   claude: ClaudeIcon as unknown as typeof Bot,
-  "claude-acp": ClaudeIcon as unknown as typeof Bot,
   codex: CodexIcon as unknown as typeof Bot,
   gemini: GeminiIcon as unknown as typeof Bot,
   amp: AmpIcon as unknown as typeof Bot,
   aider: AiderIcon as unknown as typeof Bot,
   copilot: CopilotIcon as unknown as typeof Bot,
   opencode: OpenCodeIcon as unknown as typeof Bot,
+  pi: PiIcon as unknown as typeof Bot,
 };
 
 export function getProviderIcon(provider: string): typeof Bot {