fix(app-bundle): restore missing developer-tools-rebuild-flags + request-state overlay files

[jack-champagne]

Fixes #952.

Root cause

main's vsix-gate has failed on every push since ff7b69c8 ("Sync app overlay from merged opencode local/amicode"). That commit refactored developer-tools-controller.ts to import applyRebuildFlagMutation/rebuildFlagMutation from ./developer-tools-rebuild-flags and reduceDevToolsRequest from ./developer-tools-request-state, but never added either sibling module — the overlay sync brought over one file's new content without its new same-commit dependencies. vite build fails with Could not resolve "./developer-tools-rebuild-flags".

Fix

Both modules are real, tested logic — not something to revert. developer-tools-rebuild-flags.ts encodes the fix for #940 (a rebuild-in-progress dialog reopen must show "Rebuilding...", never "Rebuilt!"); developer-tools-request-state.ts encodes the companion fix (starting a new path-validation round-trip must not blank the stale status — that was the flicker bug). Pulled byte-for-byte from harmoniqs/opencode's local/amicode branch (the overlay's actual source for this file), including their existing test files, rather than reverting the controller's refactor.

manifest.json refreshed via the package's own node scripts/refresh_manifest.mjs (after materialize.mjs populated the upstream cache) rather than hand-edited — diff is exactly the 4 new entries (A, correct sha256) plus the per_package/counts bump, nothing else touched.

Validation

• Full pnpm --filter amicode run package (the exact vsix-gate command) now completes end-to-end and produces amicode.vsix, where it was failing at the vite build step before this fix.
• bun test on both restored test files (in the materialized tree): 11/11 pass.
• git status before commit showed exactly these 5 files — no unrelated overlay drift picked up.

[coderabbitai]

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📥 Commits

Reviewing files that changed from the base of the PR and between 68ffcd9 and c51a186.

📒 Files selected for processing (5)

• packages/app-bundle/manifest.json
• packages/app-bundle/overlay/packages/app/src/components/settings-v2/developer-tools-rebuild-flags.test.ts
• packages/app-bundle/overlay/packages/app/src/components/settings-v2/developer-tools-rebuild-flags.ts
• packages/app-bundle/overlay/packages/app/src/components/settings-v2/developer-tools-request-state.test.ts
• packages/app-bundle/overlay/packages/app/src/components/settings-v2/developer-tools-request-state.ts

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