fix(companion): emit draft from user-turn tool_result + stamp space_id on created entities

- driver: tool_results arrive as type:'user' content blocks (not bare); parse them
- route: tool_result content is a JSON string; parse it for pending_change_id → draft event
- propose_change: inject ctx.space_id into create payloads (model can't know the uuid; tables require it)

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

lib/ai/agent/tools/propose_change.js

@@ -23,13 +23,22 @@ export const proposeChangeTool = {
     if (tier === 'deny') {
       return { error: `not permitted to ${action} ${entity_type}` };
     }
+    // Stamp the current Space onto newly-created space-scoped entities — the
+    // model doesn't know the Space uuid, and these tables require space_id NOT NULL.
+    const SPACE_SCOPED = ['task', 'page', 'project', 'resource'];
+    const finalPayload = { ...(payload ?? {}) };
+    if (action === 'create' && ctx.space_id && SPACE_SCOPED.includes(entity_type)
+        && finalPayload.space_id == null) {
+      finalPayload.space_id = ctx.space_id;
+    }
+
     // v1: drafting always routes through approval, even for allow-tier agents.
     const change = await pendingChanges.create({
       agent_id: ctx.agent.id,
       entity_type,
       entity_id: entity_id ?? null,
       action,
-      payload: payload ?? {},
+      payload: finalPayload,
       reason: reason ?? null
     });
     return {

lib/ai/claude_cli.js

@@ -222,13 +222,26 @@ export async function runClaudeTurn(opts) {
         return;
       }
 
+      if (t === 'user') {
+        // Tool results arrive as a synthetic user turn:
+        // { type:"user", message:{ role:"user", content:[{ type:"tool_result", tool_use_id, content }] } }
+        const blocks = raw.message?.content;
+        if (Array.isArray(blocks)) {
+          for (const b of blocks) {
+            if (b?.type === 'tool_result') {
+              const name = toolById.get(b.tool_use_id) || null;
+              emit({ type: 'tool_result', name, result: b.content });
+            }
+          }
+        }
+        return;
+      }
+
       if (t === 'tool_result') {
-        // { type: "tool_result", tool_use_id: "...", content: [...] }
+        // Bare top-level variant (older/alt shape): { type:"tool_result", tool_use_id, content }
         const id = raw.tool_use_id;
         const name = toolById.get(id) || null;
-        const result = raw.content;
-        const ev = { type: 'tool_result', name, result };
-        emit(ev);
+        emit({ type: 'tool_result', name, result: raw.content });
         return;
       }