fix(goals): make /goal work in TUI and fix gateway verdict delivery (#19209)

/goal was silently broken outside the classic CLI.

TUI: /goal was routed through the HermesCLI slash-worker subprocess,
which set the goal row in SessionDB but then called
_pending_input.put(state.goal) — the subprocess has no reader for that
queue, so the kickoff message was discarded. No post-turn judge was
wired into prompt.submit either, so even a manual kickoff would not
continue the goal loop. Intercept /goal in command.dispatch instead,
drive GoalManager directly, and return {type: send, notice, message}
so the TUI client renders the Goal-set notice and fires the kickoff.
Run the judge in _run_prompt_submit after message.complete, surface
the verdict via status.update {kind: goal}, and chain the continuation
turn after the running guard is released.

Gateway: _post_turn_goal_continuation was gated on
hasattr(adapter, 'send_message'), but adapters only expose send().
That branch was dead on every platform — users never saw
'✓ Goal achieved', 'Continuing toward goal', or budget-exhausted
messages. Replace the dead call with adapter.send(chat_id, content,
metadata) and drop a broken reference to self._loop.

Tests:
- tests/tui_gateway/test_goal_command.py — full /goal dispatch matrix
  (set / status / pause / resume / clear / stop / done / whitespace)
  plus regressions for slash.exec → 4018 and 'goal' staying in
  _PENDING_INPUT_COMMANDS.
- tests/gateway/test_goal_verdict_send.py — locks in the adapter.send
  path for done / continue / budget-exhausted and verifies the hook
  no-ops when no goal is set or the adapter lacks send().

ui-tui/src/app/createGatewayEventHandler.ts

@@ -287,6 +287,11 @@ export function createGatewayEventHandler(ctx: GatewayEventHandlerContext): (ev:
           return
         }
 
+        if (p.kind === 'goal') {
+          sys(p.text)
+          return
+        }
+
         if (!p.kind || p.kind === 'status') {
           return
         }

ui-tui/src/app/createSlashHandler.ts

@@ -114,6 +114,9 @@ export function createSlashHandler(ctx: SlashHandlerContext): (cmd: string) => b
             }
 
             if (d.type === 'send') {
+              if (d.notice?.trim()) {
+                sys(d.notice)
+              }
               return d.message?.trim() ? send(d.message) : sys(`/${parsed.name}: empty message`)
             }
           })

ui-tui/src/gatewayTypes.ts

@@ -47,7 +47,7 @@ export type CommandDispatchResponse =
   | { output?: string; type: 'exec' | 'plugin' }
   | { target: string; type: 'alias' }
   | { message?: string; name: string; type: 'skill' }
-  | { message: string; type: 'send' }
+  | { message: string; notice?: string; type: 'send' }
 
 // ── Config ───────────────────────────────────────────────────────────
 

ui-tui/src/lib/rpc.ts

@@ -27,7 +27,11 @@ export const asCommandDispatch = (value: unknown): CommandDispatchResponse | nul
   }
 
   if (t === 'send' && typeof o.message === 'string') {
-    return { type: 'send', message: o.message }
+    return {
+      type: 'send',
+      message: o.message,
+      notice: typeof o.notice === 'string' ? o.notice : undefined,
+    }
   }
 
   return null