Cross-platform restart script, pnpm 10 overrides migration, passthrough-reason dashboard detail

[SiNaPsEr0x]

Summary

Three independent fixes/improvements bundled together:

1. Cross-platform restart script

• Replaces scripts/restart.sh (Bash) with scripts/restart.mjs (Node), so pnpm restart works on Windows without requiring git-bash/WSL.
• Adds .gitattributes to force *.sh text eol=lf, preventing CRLF corruption of any remaining shell scripts on Windows checkouts.
• Drops tests/restart.test.sh (Bash-only test for the removed script) and the corresponding test:restart npm script; the new restart.mjs behavior is exercised manually since it's a thin process-management wrapper.

2. pnpm 10 overrides migration

• Moves the pnpm.overrides block from package.json to pnpm-workspace.yaml, which is where pnpm 10 actually reads overrides from (the package.json location is silently ignored on pnpm 10, so the ws/vite/undici/esbuild security pins were not being applied).
• Adds an explicit allowScripts block for esbuild, sharp, and workerd so pnpm install doesn't prompt/block on their postinstall scripts.

3. Passthrough-reason detail (transform / tracker / dashboard / shell log)

• Adds a new render_not_profitable passthrough reason (distinct from the existing not_profitable) and a kept_sharp counter, threaded through TransformInfo → TrackEvent → dashboard RecentRow.
• Introduces PASSTHROUGH_REASON_LABELS and formatPassthroughReasons() in src/core/transform.ts as the single source of truth for reason labels, consumed by both the shell logger (src/node.ts, new passthrough[...] log tag) and the dashboard (src/dashboard/fragments.ts) so the CLI log and the web UI never drift out of sync.
• Dashboard "Sent as" column: collapses below_threshold / not_profitable / render_not_profitable into a single text badge with a tooltip breakdown (previously showed a confusing "image below threshold" label on rows that were actually sent as text), and keeps kept_sharp as its own visible badge since that's an image that intentionally skipped compression, not text.

4. Misc

• .gitignore: exclude local log_chat.html export artifact.

Testing

• pnpm typecheck / existing vitest suite (transform/tracker coverage unaffected by the additive fields).
• Manually verified pnpm restart on Windows (git-bash) and confirmed the previous $'\r': command not found failure is gone.
• Manually verified pnpm install no longer needs interactive approval for esbuild/sharp/workerd postinstall scripts, and that the ws/vite/undici/esbuild overrides are actually applied (pnpm why <pkg>).

Happy to split into separate PRs if preferred — flagging here in case reviewers want the pnpm-overrides fix isolated since it's the most "drop-in" of the three.