fix(tui): establish 2-tier readiness model, modal/hint token separation, and adapter modal contracts

- Separate TUI dialog detection into blocking gate layer (_MAM_MODAL_TOKENS) and recovery layer (_MAM_HINT_TOKENS) to eliminate idle dialog starvation
- Add modal_tokens contract across agent adapters (claude, cline) with dynamic scope facts resolution in send_keys_safe
- Implement fail-closed resolution for ambiguous same-kind panes (R-1) and enforce WORKSPACE_ROOT export (R-2)
- Preserve session on TUI readiness timeout when PID is alive for diagnostics
- Add comprehensive test suite in tests/test_c1_tui_readiness.py and adapter contract assertions in test_a4

.agents/skills/lib_py/agents/adapters/cline.py

@@ -16,6 +16,18 @@ class ClineAgentAdapter(BaseAgentAdapter):
     def ready_tokens(self) -> str:
         return 'Cline|history|Chat|What can I do|slash commands'
 
+    @property
+    def strong_ready_tokens(self) -> str:
+        return 'Cline|What can I do|slash commands'
+
+    @property
+    def weak_ready_tokens(self) -> str:
+        return 'history|Chat'
+
+    @property
+    def modal_tokens(self) -> Optional[str]:
+        return 'Select API Provider|Enter API Key|Select an API provider|API Provider|Cline API key'
+
     @property
     def exit_key(self) -> str:
         return '/exit'