Add email-agent runner with suspend/resume agent loop

Introduce EmailAgentRunner Durable Object and email-agent nodes that
send a message and park until a reply arrives. The agent loop gains a
suspend/resume path: suspending tools return an AgentLoopSuspension the
caller fulfils asynchronously, then resumes via resumeState +
resumeToolResults. MailboxDO tags threads with an owning agent run so
inbound replies route to the runner instead of re-triggering workflows.

Extract LLM dispatch (agent-llm.ts) and tool/service wiring
(agent-services.ts) out of AgentRunner so both runners share them. Also
bump hono, react-router, vite, and exifreader.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: bchapuis

apps/api/package.json

@@ -48,7 +48,7 @@
     "aws4fetch": "^1.0.20",
     "cron-parser": "^5.5.0",
     "drizzle-orm": "0.45.2",
-    "hono": "^4.12.18",
+    "hono": "^4.12.26",
     "jose": "^6.2.3",
     "nanoid": "^5.1.11",
     "openai": "^6.37.0",

apps/api/src/context.ts

@@ -4,6 +4,7 @@ import type { FFmpegContainer } from "./containers/ffmpeg-container";
 import type { LanguageSandbox } from "./containers/language-sandbox";
 import type { AgentRunner } from "./durable-objects/agent-runner";
 import { DatabaseDO } from "./durable-objects/database-do";
+import type { EmailAgentRunner } from "./durable-objects/email-agent-runner";
 import type { MailboxDO } from "./durable-objects/mailbox-do";
 import type { WorkflowAgent } from "./durable-objects/workflow-agent";
 
@@ -17,6 +18,7 @@ export interface Bindings {
   WORKFLOW_AGENT: DurableObjectNamespace<WorkflowAgent>;
   DATABASE: DurableObjectNamespace<DatabaseDO>;
   AGENT_RUNNER: DurableObjectNamespace<AgentRunner>;
+  EMAIL_AGENT_RUNNER: DurableObjectNamespace<EmailAgentRunner>;
   MAILBOX: DurableObjectNamespace<MailboxDO>;
   FFMPEG_CONTAINER?: DurableObjectNamespace<FFmpegContainer>;
   DUCKDB_SANDBOX?: DurableObjectNamespace<any>;