Fix Electron composer lag and stale generation failures (#3593)

* Keep chat typing and web CSS resolution responsive

Cache the normalized mention index by entity array and scan only concrete @ positions so the composer does not rescan every file/plugin/skill token on each draft update. Link the shared components package at the root importer so Turbopack/PostCSS can resolve the exported component stylesheet from the web CSS entrypoint.

Constraint: Chat composer typing updates run on every keystroke in Electron, and tools-dev/Next evaluates global CSS from the workspace root.
Rejected: Debouncing textarea state updates | would make text entry feel stale and would not remove the expensive synchronous parser path.
Rejected: Relative-importing package source CSS from apps/web | would bypass the package export contract and hardcode package layout into the app stylesheet.
Confidence: high
Scope-risk: narrow
Directive: Keep inline mention parsing proportional to draft mention markers, and keep package CSS imports resolvable through workspace package links.
Tested: pnpm install
Tested: pnpm --filter @open-design/web test -- tests/utils/inlineMentions.test.ts
Tested: pnpm --filter @open-design/web typecheck
Tested: pnpm --filter @open-design/web build
Tested: pnpm guard
Not-tested: Full web Vitest remains blocked by unrelated CSS selector tests observed before this commit.

* Keep composer typing off the render path

Move keystroke-time draft updates into the textarea/ref path while deferring React draft rendering, mention overlay work, picker filtering, and localStorage persistence so Electron input echo stays within frame budget.

Constraint: Electron chat input was visibly lagging for plain text and mention text while the right iframe stayed responsive.

Rejected: Keep the textarea fully controlled | every keystroke still synchronizes the largest ChatComposer render path.

Confidence: high

Scope-risk: moderate

Directive: Keep prompt submission, slash commands, and mention insertion reading draftRef when draft rendering is deferred.

Tested: pnpm guard; pnpm --filter @open-design/web typecheck; pnpm --filter @open-design/web build; pnpm exec vitest run -c vitest.config.ts tests/components/ChatComposer.infinite-render.test.tsx; pnpm exec vitest run -c vitest.config.ts tests/components/ChatComposer.context-pickers.test.tsx; pnpm exec vitest run -c vitest.config.ts tests/utils/inlineMentions.test.ts; Electron inspect eval plain text avg 0.03ms max 0.5ms; Electron inspect eval @ path avg 0.03ms max 0.1ms; HTTP smoke status 200 with no components CSS resolve error.

Not-tested: Full web Vitest suite and Playwright UI suite.

* Keep Electron chat input responsive under heavy projects

Constraint: Electron project views can carry large chat/file DOM and Chromium can throttle or defer visible renderer work under tab/window visibility edge cases.
Rejected: Re-rendering the composer draft on every plain keystroke | it couples textarea input to mention overlay, resize, storage, and project layout work.
Confidence: medium
Scope-risk: moderate
Directive: Keep plain text input on the textarea/ref path; only commit React draft state immediately for mention, slash, chip, or imperative draft mutations.
Tested: pnpm guard; pnpm --filter @open-design/web typecheck; pnpm exec vitest run -c vitest.config.ts tests/components/ChatComposer.infinite-render.test.tsx; pnpm --filter @open-design/desktop test; pnpm --filter @open-design/desktop typecheck; desktop inspect actual project composer with OS SendKeys.
Not-tested: Push/PR remains blocked by GitHub 403 for mimicryluden on nexu-io/open-design.

* Keep heavy project typing isolated from preview layout

Constraint: Electron project panes can carry large DOM histories and preview frames that make textarea paint sensitive to parent layout.

Rejected: Further debouncing ChatComposer input state | app-side handler costs were already low while native textarea updates still lagged.

Confidence: high

Scope-risk: moderate

Directive: Keep the composer mounted through the fixed layer/slot pair so future layout changes do not pull typing back into the split-pane flex reflow path.

Tested: pnpm --filter @open-design/web typecheck; pnpm exec vitest run -c vitest.config.ts tests/components/ChatComposer.infinite-render.test.tsx tests/components/ChatComposer.context-pickers.test.tsx; pnpm guard; pnpm --filter @open-design/web build; desktop inspect fixed-layer DOM and SendKeys probe avg beforeinput->input 1.4ms max 2.5ms

Not-tested: PR publish blocked by GitHub repository permissions if remote still rejects mimicryluden

* Keep stale run recovery from hiding generated previews

Constraint: Completed daemon runs can outlive the in-memory run registry after a restart.

Rejected: Replaying succeeded rows with empty producedFiles | It turns completed messages into failed messages when the registry is gone.

Confidence: high

Scope-risk: narrow

Directive: Only active run statuses should enter daemon reattach recovery.

Tested: vitest generation-preview; vitest ProjectView reattach restore; web typecheck; pnpm guard; web build; desktop DOM eval failureText=false iframeCount=2

Not-tested: Fresh provider generation against an external model

* Keep composer contracts aligned with latest main

Rebase conflict resolution restored the current composer contract while leaving the lower-risk latency fixes in separate layers.

Constraint: The branch was rebased over newer workspace/session context composer contracts.

Rejected: Keeping the older composer conflict side because it removed current ChatComposer props and broke web typecheck.

Confidence: high

Scope-risk: narrow

Directive: Preserve upstream ChatComposer contracts when rebasing input-latency work.

Tested: web typecheck; targeted ChatComposer, inlineMentions, ProjectView generation-preview tests; desktop window-chrome test

Not-tested: Full browser interaction after fork push

* Fix daemon Nix workspace symlink pruning

---------

Co-authored-by: Siri-Ray <2667192167@qq.com>

nix/package-daemon.nix

@@ -148,11 +148,13 @@ in
       # just apps/daemon.
       cp -r . $out/lib/open-design/
 
-      # Root devDependencies expose tool workspaces via pnpm symlinks, but the
-      # daemon derivation intentionally filters tools/ out of src because they
-      # are not needed at runtime. Prune the dangling symlinks from the copied
-      # node_modules tree so Nix fixup does not fail on broken links.
+      # Root devDependencies expose non-daemon workspaces via pnpm symlinks,
+      # but the daemon derivation intentionally filters those sources out
+      # when they are not needed at runtime. Prune the dangling symlinks from
+      # the copied node_modules tree so Nix fixup does not fail on broken
+      # links.
       rm -f \
+        $out/lib/open-design/node_modules/@open-design/components \
         $out/lib/open-design/node_modules/@open-design/tools-dev \
         $out/lib/open-design/node_modules/@open-design/tools-pack \
         $out/lib/open-design/node_modules/@open-design/tools-serve \

nix/pnpm-deps.nix

@@ -9,6 +9,6 @@
   # 1. Temporarily set the consuming `hash = lib.fakeHash;`
   # 2. Run the relevant nix build/flake check
   # 3. Copy the expected hash printed by Nix into the matching field below
-  daemonHash = "sha256-mfUyOYOIg1COFKEqm3ZUt9iXEileTeFfRiTff5CXYfk=";
+  daemonHash = "sha256-j/JjPITwavF9LOp6g+OZ9GVLD1c7fQki4D5XVXgdlNs=";
   webHash = "sha256-V1Ua3YEUmfJcnKGLK3y7OdFdcu6A6D1+mRvggm6Jrh4=";
 }