T18 round 2 fixes: a folder the terminal cannot enter stops the start, and links read combining clusters whole

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

TASKS.md

@@ -240,4 +240,5 @@ Per-component lines live in `tasks/`. Tags there:
 | T17d | 2 | PASS | |
 | T17e | 1 | PASS | |
 | T18 | 1 | FAIL | a missing folder ran in the app's own; combining marks dropped; Tab skipped the terminal; its wheel scrolled the page too; clear kept find matches; New bash reused the old shell; the dark script typed into the replay |
-| T18 | 2 | — | pending review |
+| T18 | 2 | FAIL | a folder it could not enter still started the shell elsewhere; links read cluster cells as spaces |
+| T18 | 3 | — | pending review |