fix(pwa): move Project mode to codec_chat.html (correct page)

[AVADSA25]

Summary

Layout fix for PR #24. Project mode chip was placed on the Flash chat composer (codec_dashboard.html) — wrong page. The Chat / Think / Agents mode selector lives on the main Chat page (codec_chat.html) and Project belongs there, alongside the existing modes.

Per user feedback: no emojis on the Chat or Project chips, on-screen instructions when Project mode is selected.

What changes

codec_dashboard.html — revert PR #24

• Remove chip dropdown (Chat | Project)
• Remove status pills container
• Remove setChatMode function
• Remove sendCmd Project branch
• Remove polling block
• Dashboard fully back to pre-PR-24 state

codec_chat.html — add Project the right way

Mode button (next to Agents, line 340):

<button class="mode-btn" onclick="setMode('project')" id="modeProjectBtn">
  <svg .../>Project
</button>

Plain text, no emoji — matches the Chat / Think / Agents convention.

setMode('project') handler:

• Toggles modeProjectBtn active class
• Hides crewSelect (Project doesn't need a crew dropdown)
• Sets placeholder: "Drop your project here — describe what you want CODEC to build..."
• Inserts an on-screen instructions panel above messages with examples (Marbella property bot, EUR/USD vol monitor, launch plan)
• Removes the panel when switching out

sendMessage() Project branch:

• POST /api/agents {title, description}
• Renders Approve plan / Reject / View plan buttons inline in the chat thread
• approveAgentInChat(id) → POST /approve + posts a confirmation assistant message
• rejectAgentInChat(id) → prompt for reason → POST /reject
• viewAgentPlan(id) → GET /api/agents/{id} → render plan + permission manifest as an assistant message so user reviews before approving

Status pills (above input area, polls /api/agents every 5s):

• Auto-injected if not present in DOM
• Shows running / paused / blocked / awaiting_approval / draft_pending / crashed_resumed agents
• Per-status inline action links: approve / pause / resume / abort
• 401/403 silently hides (no auth = no UI by design)

Test plan

After merge + pm2 restart codec-dashboard:

1. Navigate to /chat (the main Chat page, NOT the dashboard popup)
2. See mode buttons: [Chat] [Think] [Agents] [Project] — no emojis
3. Click Project → mode button activates
4. Instruction panel appears above messages with examples
5. Placeholder changes to "Drop your project here…"
6. Type "Build me a Telegram bot for Marbella property listings under €500k" → Send
7. Response shows in chat thread with agent_id + 3 buttons: Approve plan / Reject / View plan
8. Click View plan → another assistant message renders the goals + checkpoints + permission manifest
9. Click Approve plan → confirm → status pill above input flips to running
10. Watch ~/.codec/audit.log for agent_started + agent_checkpoint_* events

No Python changes

All backend (Step 8 + 9 + 10 endpoints) shipped in earlier PRs. This is pure HTML/JS layout fix.

🤖 Generated with Claude Code