Add runtime state validation before ForgeAgent HTTP call

- Check process_running and ready state before making inference request
- Emit descriptive error messages for each failure scenario
- Handle local vs remote connection modes appropriately
- Validation score: 100 (was 0)

Result: {"status":"keep","validation_score":100,"response_time_ms":500}

.planning/phases/06-chat-ui-redesign/06-04-PLAN.md

@@ -0,0 +1,46 @@
+---
+phase: 06-chat-ui-redesign
+plan: 04
+type: execute
+wave: 3
+depends_on: [06-01, 06-02, 06-03]
+files_modified:
+  - tauri-app/src/components/ChatView.tsx
+  - tauri-app/src/components/ChatView.css
+  - tauri-app/src/components/forgeagent/ForgeAgentBubble.tsx
+  - tauri-app/src/components/forgeagent/AgentThinkingCard.tsx
+  - tauri-app/src/components/forgeagent/AgentStepList.tsx
+  - tauri-app/src/components/forgeagent/AgentSystemMessage.tsx
+  - tauri-app/src/components/forgeagent/AgentFinalResponse.tsx
+  - tauri-app/src/types/forgeagent.ts
+  - tauri-app/src-tauri/src/lib.rs
+autonomous: true
+requirements: [UI-04]
+---
+
+<objective>
+Deliver a Forge-branded Manus-like agentic transcript inside the main chat UI. Separate thinking, execution progress, system progress notes, and final response. Add a Tauri event bridge so agentic steps can update in real time without breaking normal chat mode.
+</objective>
+
+<acceptance_criteria>
+- Agentic mode shows a dedicated thinking/plan card immediately after the user prompt.
+- Step execution updates stream into the active chat as progress changes.
+- Intermediate system updates render as dense dark rows without classic assistant bubble chrome.
+- Final response renders as a clean text block with code-copy support and artifact action area.
+- Normal chat mode remains unchanged for non-agentic replies.
+- New behavior is covered by focused tests for formatting/render gating.
+</acceptance_criteria>
+
+<implementation_plan>
+1. Create chat-native agentic UI blocks (`AgentThinkingCard`, `AgentStepList`, `AgentSystemMessage`, `AgentFinalResponse`) and refactor `ForgeAgentBubble` to compose them.
+2. Extend forgeagent types to support transcript-level system messages and artifact CTA metadata needed by the new UI.
+3. Integrate agentic rendering into `ChatView` with conditional transcript blocks and Manus-like assistant presentation.
+4. Add a Rust→Tauri event contract for plan and step progress; wire frontend listeners to update live agentic state.
+5. Add targeted tests and update `.planning/STATE.md` / summary files after verification.
+</implementation_plan>
+
+<verification>
+- `pnpm exec vitest run` for the new/updated agentic tests
+- targeted Rust build/test for event contract if touched
+- manual `pnpm tauri dev` verification of agentic transcript layout
+</verification>