feat(05-04): update /status to show active discussion info

Enhance status command to display:
- Selected project name and configured models
- Active discussion state (round progress, message count)
- Short discussion ID for reference
- Contextual hints for next actions

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/moai/bot/handlers/status.py

@@ -3,14 +3,18 @@
 from telegram import Update
 from telegram.ext import ContextTypes
 
+from moai.bot.handlers.projects import get_selected_project
 from moai.core.ai_client import get_ai_client
+from moai.core.services.discussion import get_active_discussion
 
 
 async def status_command(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
     """Handle /status command - show current project/discussion state.
 
-    For now, shows a placeholder since project management isn't implemented yet.
-    Will be expanded in Phase 3 to show actual project state.
+    Shows:
+    - Bot and AI router status
+    - Selected project (if any)
+    - Active discussion state (if any)
     """
     # Check AI client status
     try:
@@ -19,12 +23,51 @@ async def status_command(update: Update, context: ContextTypes.DEFAULT_TYPE) ->
     except RuntimeError:
         ai_status = "AI Router: not configured"
 
-    # TODO: Phase 3 - Query actual project/discussion state from database
-    status_text = (
-        "*MoAI Status*\n\n"
-        "Bot: Online\n"
-        "Database: Connected\n"
-        f"{ai_status}\n\n"
-        '_No project selected. Use /project new "Name" to create one._'
-    )
-    await update.message.reply_text(status_text, parse_mode="Markdown")
+    # Build status lines
+    status_lines = [
+        "*MoAI Status*\n",
+        "Bot: Online",
+        "Database: Connected",
+        ai_status,
+        "",
+    ]
+
+    # Check for selected project
+    project = await get_selected_project(context)
+    if project is None:
+        status_lines.append('_No project selected. Use /project new "Name" to create one._')
+    else:
+        status_lines.append(f"*Project:* {project.name}")
+        if project.models:
+            models_str = ", ".join(project.models)
+            status_lines.append(f"Models: {models_str}")
+        else:
+            status_lines.append("Models: none configured")
+
+        # Check for active discussion
+        discussion = await get_active_discussion(project.id)
+        if discussion is not None:
+            # Count messages across all rounds
+            message_count = sum(len(r.messages) for r in discussion.rounds)
+            round_count = len(discussion.rounds)
+
+            # Check for in-progress discussion state
+            disc_state = context.user_data.get("discussion_state")
+            if disc_state and disc_state.get("discussion_id") == discussion.id:
+                current_round = disc_state["current_round"]
+                round_limit = disc_state["round_limit"]
+                status_lines.append("")
+                status_lines.append(f"*Active Discussion:* Round {current_round}/{round_limit}")
+                status_lines.append(f"Discussion ID: {discussion.id[:8]}...")
+                status_lines.append(f"Messages: {message_count}")
+            else:
+                status_lines.append("")
+                status_lines.append(f"*Active Discussion:* {round_count} rounds completed")
+                status_lines.append(f"Discussion ID: {discussion.id[:8]}...")
+                status_lines.append(f"Messages: {message_count}")
+                status_lines.append("_Use /discuss to continue or /stop to end._")
+        else:
+            status_lines.append("")
+            status_lines.append("_No active discussion. Use /open <question> to start._")
+
+    await update.message.reply_text("\n".join(status_lines), parse_mode="Markdown")