feat: phases + tasks — per-task execution with phase directories

- A phase is now a directory: 00_phase.md (overview + task index) plus
  small, quick NN_task.md task files; complete/ mirrors todo/
- Task is the unit of execution: run-task.sh (one unit), run-phase.sh
  (phase to completion incl. 00_phase.md final pass), auto-phase.sh
  (all units in order); validate.sh gate runs after every task
- PHASE_COMMIT commits at phase boundaries (00_phase.md / legacy file moves)
- Legacy flat todo/NN_name.md files still execute as a single unit;
  new migrate-phases-to-tasks.sh converts them to the directory layout
- phase-status.sh reports per-task state and the next unit
- New task-template.md; phase templates now carry a Tasks index

convert-to-phased/scripts/project-audit.sh

@@ -95,37 +95,41 @@ for d in workflows features user_stories; do
 done
 todo_dir="$root/.agent/phases/todo"
 complete_dir="$root/.agent/phases/complete"
-if [[ -d "$todo_dir" ]]; then
-  echo "  .agent/phases/todo:"
-  any=0
-  for f in "$todo_dir"/*.md; do
-    if [[ -e "$f" ]]; then
-      echo "    $(basename "$f")"
+list_phases() {
+  local dir="$1" entry n t any=0
+  for entry in "$dir"/*; do
+    if [[ ! -e "$entry" ]]; then continue; fi
+    n="$(basename "$entry")"
+    if [[ "$n" =~ ^[0-9] ]]; then
+      if [[ -d "$entry" ]]; then
+        t="$(ls -1 "$entry" 2>/dev/null | grep -cE '\.md$' || true)"
+        echo "    $n/ ($t file(s): 00_phase.md + tasks)"
+      else
+        echo "    $n (legacy single-file phase)"
+      fi
       any=1
     fi
   done
   if (( ! any )); then echo "    (empty)"; fi
+}
+if [[ -d "$todo_dir" ]]; then
+  echo "  .agent/phases/todo:"
+  list_phases "$todo_dir"
   a=1
 fi
 if [[ -d "$complete_dir" ]]; then
   echo "  .agent/phases/complete:"
-  any=0
-  for f in "$complete_dir"/*.md; do
-    if [[ -e "$f" ]]; then
-      echo "    $(basename "$f")"
-      any=1
-    fi
-  done
-  if (( ! any )); then echo "    (empty)"; fi
+  list_phases "$complete_dir"
   a=1
 fi
 if (( ! a )); then echo "  (no .agent/ artifacts — full conversion needed)"; fi
 
 max=0
 for d in "$todo_dir" "$complete_dir"; do
-  for f in "$d"/*.md; do
-    if [[ ! -e "$f" ]]; then continue; fi
-    n="$(basename "$f" .md)"
+  [[ -d "$d" ]] || continue
+  for entry in "$d"/*; do
+    if [[ ! -e "$entry" ]]; then continue; fi
+    n="$(basename "$entry" .md)"
     if [[ "$n" =~ ^([0-9]+) ]]; then
       n=$((10#${BASH_REMATCH[1]}))
       if (( n > max )); then max=$n; fi