fix(media-apply): refuse a plan row whose verb the tool does not know

read_plan's if/elif chain had no else, so any row that was not mkdir, keep
or move was dropped in silence. A plan of nothing but typos therefore
applied as a successful no-op: on 2026-11-02 a pass meant to rename two
TVShows series folders reported "applied: 0 moved" and exit 0, and the
journal was never written — nothing told the operator the plan had never
been read. An unread row is a plan bug, and every other plan bug in this
tool refuses before the first rename, so now this one does too, naming the
line and the verb.

cwd: /home/blank/.omp/wt/wt-20261030-163847-6d1fc1f · session: 01a18f2e-18b1-7573-bcd5-ac99636f8bcb

scripts/media-apply.py

@@ -121,14 +121,14 @@ class Journal:
 
 def read_plan(path, root, force):
     """Plan rows: (mkdirs, keeps, moves), header dropped, all paths under root."""
-    mkdirs, keeps, moves = [], [], []
+    mkdirs, keeps, moves, bad = [], [], [], []
     with open(path) as fh:
         header = fh.readline()
         if not header.startswith("action\t"):
             raise Refuse(f"{path} is not a plan (first column is "
                          f"{header.split(chr(9))[0]!r}, expected 'action') —"
                          " regenerate it with scripts/media-plan.py")
-        for line in fh:
+        for n, line in enumerate(fh, 2):
             f = line.rstrip("\n").split("\t")
             if f[0] == "mkdir":
                 mkdirs.append(f[2])
@@ -136,6 +136,14 @@ def read_plan(path, root, force):
                 keeps.append(f[1])
             elif f[0] == "move":
                 moves.append((f[1], f[2], f[3] if len(f) > 3 else ""))
+            else:
+                bad.append(f"line {n}: unknown action {f[0]!r} — this tool"
+                           " knows mkdir, keep and move (a rename is a move)")
+    if bad:
+        # A row this tool could not read is a plan bug, and a plan bug refuses:
+        # silently dropping it turns a typo into a no-op run that reports success.
+        head = "; ".join(bad[:3])
+        raise Refuse(head + (f" (+{len(bad) - 3} more)" if len(bad) > 3 else ""))
     if not force:
         for p in mkdirs + keeps + [p for m in moves for p in m[:2]]:
             if p and not (p == root or p.startswith(root + os.sep)):