docs(viewer): fix round 1 — fallback trap, tracked checklist, residual-risk framing

- CLAUDE.md: document the viewer.html fallback trap (missing/broken Vite entry
  silently serves index.html into the viewer window) and point at the Rust test
  that pins it.
- Give the manual verification checklist a durable, tracked home: append it as
  a markdown task list to the terminal-file-viewer design spec, including the
  file-path hover key-hint wording check and the CRLF/BOM round-trip save check.
- default.json: state the app-command residual risk and the pending AppManifest
  lockdown directly in the capability file's own description, not only in
  CLAUDE.md, since this file is the reviewed threat model of record.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs/superpowers/specs/2026-09-22-terminal-file-viewer-design.md

@@ -345,3 +345,52 @@ click, editable, CodeMirror 6, probe-roots resolution, 2 s polling, no autosave,
 10. **Event delivery (§3).** `emit_to(label, …)` still reaches a bare `listen()` in the main
     window, so the viewer subscribes via `getCurrentWindow().listen` and the main window has no
     listener for viewer event names.
+
+## Manual verification checklist
+
+Not runnable inside the planning/implementation container: it needs `npx tauri dev` on a machine
+with a display, plus a running project container. Run this after every task on this feature has
+landed, including any review fix rounds (in particular Task 11's CRLF/BOM save fix, item 16
+below).
+
+- [ ] 1. In a Claude session, ask for a file listing; click `src/…` paths, `/workspace/...`
+      absolute paths, a `path:line` and a `path:start-end`. Each opens its own window titled
+      `<basename> — <project>`, scrolled to and highlighting the line/range.
+- [ ] 2. Click the same path again → the existing window is focused and re-highlights; no
+      duplicate.
+- [ ] 3. Open 20 windows; the 21st click shows the "20 file windows are already open" toast.
+- [ ] 4. Edit, `Ctrl+S`: file changes in the container (`cat` it in a bash tab); mode preserved
+      (`stat -c %a`); owner is the container user.
+- [ ] 5. While a window is open, have Claude edit the file: clean window reloads with "Reloaded";
+      a dirty window shows "Changed on disk" with both buttons; "Overwrite on save" then Save
+      succeeds; "Reload (discard mine)" drops the edits.
+- [ ] 6. Save while the file changed between polls → "Changed on disk" banner, no data written.
+- [ ] 7. Delete the file in a bash tab → "File no longer exists", text still copyable, Save
+      disabled.
+- [ ] 8. Stop the project with a window open → "Container not running" banner; start it → banner
+      clears, polling resumes.
+- [ ] 9. Click a path under `/etc` or a `file:///etc/hosts` OSC 8 link → read-only badge with the
+      write-roots reason.
+- [ ] 10. Close a dirty window with the X → Save / Discard / Cancel bar; Cancel keeps it open;
+      Discard closes.
+- [ ] 11. Close the *main* window with viewers open → app exits, viewers close.
+- [ ] 12. Ctrl/Cmd+Shift+I opens devtools in a viewer in dev; in a release build the CSP console
+      shows no violations (CodeMirror styles apply).
+- [ ] 13. A wrapped long path (narrow the terminal) underlines across the wrap and opens.
+- [ ] 14. Image (`.png`) opens read-only; a `.bin`/binary shows "not text".
+- [ ] 15. **File-path hover key-hint wording.** Hover a plain-text file-path link in the terminal
+      (not an OSC 8 hyperlink) while a foreground program is holding the mouse (e.g. an
+      interactive TUI like `vim`/`htop`/`claude`'s own REPL) and confirm the hover card's key hint
+      reads correctly for the platform/mode: "Shift+click to open" on non-Mac while the program
+      tracks the mouse, "Click to open" when nothing tracks the mouse, "Option+click to open" on
+      Mac with `macOptionClickForcesSelection`, or "Not clickable while a program holds the mouse"
+      on Mac without it (`openHintLabel` / `fillFileCard` in `TerminalView.tsx`). Then confirm the
+      *click itself* is held to whatever the card promised — the modifier actually required to
+      activate the link matches the hint shown, even if the program changes its mouse-tracking
+      mode between the hover and the click.
+- [ ] 16. **CRLF/BOM file round-trip save.** Open a file in the container that has Windows line
+      endings (CRLF) and/or a UTF-8 BOM (e.g.
+      `printf '\xEF\xBB\xBF\r\nfoo\r\nbar\r\n' > /workspace/<project>/crlf.txt` in a bash tab),
+      open it in the viewer, make a small text edit, and Save. Then `cat -A` (or `xxd`) the file
+      in the container and confirm the CRLF line endings and the BOM are still present/unchanged
+      apart from the edit — i.e. the save did not silently normalize them to LF or strip the BOM.