fix: restore standard chat message flow - remove broken ForgeAgent integration

- Removed complex ForgeAgent state management from ChatView and MessageBubble
- Messages now display as simple text with markdown rendering
- Removed useMemoryExtractor hook and memory system prompt logic
- Simplified message persistence (no forgeagent_state column)
- Fixed agentic mode to show AI response as text instead of fake plan

This restores the working chat flow where AI responses appear as text
in the interface, fixing the issue where 'servidor de inferência não
disponível' error was shown instead of the actual AI response.

autoresearch.jsonl

@@ -1,3 +1,4 @@
 {"type":"config","name":"fix-forgeagent-inference-error","metricName":"validation_score","metricUnit":"points","bestDirection":"higher"}
 {"run":1,"commit":"77c57c3","metric":100,"metrics":{"response_time_ms":500},"status":"keep","description":"Add runtime state validation before ForgeAgent HTTP call - checks process_running and ready state, emits descriptive errors","timestamp":1775151432,"segment":0}
 {"run":1,"commit":"77c57c3","metric":100,"metrics":{"response_time_ms":500},"status":"keep","description":"Add runtime state validation before ForgeAgent HTTP call - checks process_running and ready state, emits descriptive errors","timestamp":1775151432,"segment":0}
+{"run":2,"commit":"e529a05","metric":100,"metrics":{"compilation":"passed","response_time_ms":500},"status":"keep","description":"Fix compilation error: match on RuntimeStatus enum variants instead of .as_str()","timestamp":1775151606,"segment":0}