feat(ui): Implement Track Browser and progress visualization in MMA Dashboard

project_manager.py

@@ -10,6 +10,7 @@ import datetime
 import tomllib
 import tomli_w
 import re
+import json
 from pathlib import Path
 
 TS_FMT = "%Y-%m-%dT%H:%M:%S"
@@ -309,3 +310,85 @@ def save_track_history(track_id: str, history: list, base_dir: str | Path = ".")
     entries = [str_to_entry(h, roles) for h in history]
     state.discussion = entries
     save_track_state(track_id, state, base_dir)
+
+
+def get_all_tracks(base_dir: str | Path = ".") -> list[dict]:
+    """
+    Scans the conductor/tracks/ directory and returns a list of dictionaries 
+    containing track metadata: 'id', 'title', 'status', 'complete', 'total', 
+    and 'progress' (0.0 to 1.0).
+    Handles missing or malformed metadata.json or state.toml by falling back 
+    to available info or defaults.
+    """
+    from models import TrackState
+    tracks_dir = Path(base_dir) / "conductor" / "tracks"
+    if not tracks_dir.exists():
+        return []
+    
+    results = []
+    for entry in tracks_dir.iterdir():
+        if not entry.is_dir():
+            continue
+        
+        track_id = entry.name
+        track_info = {
+            "id": track_id,
+            "title": track_id,
+            "status": "unknown",
+            "complete": 0,
+            "total": 0,
+            "progress": 0.0
+        }
+        
+        state_found = False
+        # Try loading state.toml
+        try:
+            state = load_track_state(track_id, base_dir)
+            if state:
+                track_info["id"] = state.metadata.id or track_id
+                track_info["title"] = state.metadata.name or track_id
+                track_info["status"] = state.metadata.status or "unknown"
+                track_info["complete"] = len([t for t in state.tasks if t.status == "completed"])
+                track_info["total"] = len(state.tasks)
+                if track_info["total"] > 0:
+                    track_info["progress"] = track_info["complete"] / track_info["total"]
+                state_found = True
+        except Exception:
+            pass
+            
+        if not state_found:
+            # Try loading metadata.json
+            metadata_file = entry / "metadata.json"
+            if metadata_file.exists():
+                try:
+                    with open(metadata_file, "r") as f:
+                        data = json.load(f)
+                        track_info["id"] = data.get("id", data.get("track_id", track_id))
+                        track_info["title"] = data.get("title", data.get("name", data.get("description", track_id)))
+                        track_info["status"] = data.get("status", "unknown")
+                except Exception:
+                    pass
+        
+        # Try parsing plan.md for complete/total if state was missing or empty
+        if track_info["total"] == 0:
+            plan_file = entry / "plan.md"
+            if plan_file.exists():
+                try:
+                    with open(plan_file, "r", encoding="utf-8") as f:
+                        content = f.read()
+                        # Simple regex to count tasks
+                        # - [ ] Task: ...
+                        # - [x] Task: ...
+                        # - [~] Task: ...
+                        tasks = re.findall(r"^[ \t]*- \[[ x~]\] .*", content, re.MULTILINE)
+                        completed_tasks = re.findall(r"^[ \t]*- \[x\] .*", content, re.MULTILINE)
+                        track_info["total"] = len(tasks)
+                        track_info["complete"] = len(completed_tasks)
+                        if track_info["total"] > 0:
+                            track_info["progress"] = float(track_info["complete"]) / track_info["total"]
+                except Exception:
+                    pass
+        
+        results.append(track_info)
+    
+    return results