[codex] Implement editable composer resources

[crazygo]

Summary

• Add composer support for Shift+Enter newline while keeping Enter as send.
• Add web clipboard image paste handling for the composer and route pasted images through the existing draft image upload flow.
• Make todo resource previews editable via checkbox updates and refresh the resource list after save.
• Make note resource previews editable with Markdown formatting controls, edit/preview modes, and Save action.
• Address review findings: guard async pasted-image callbacks after disposal, keep todo/note editors visible on update failures, and align task docs/code maps with the implemented Markdown editing scope.
• Move the related task lifecycle files to docs/tasks/done/ and update code maps for the changed feature/test surfaces.

Validation

• ./tools/init_dev_env.sh
• dart format apps/mobile_chat_app/lib/features/chat/chat_navigation_page.dart apps/mobile_chat_app/test/chat_navigation_page_test.dart
• cd apps/mobile_chat_app && flutter test test/composer_bar_test.dart test/chat_navigation_page_test.dart
• cd apps/mobile_chat_app && flutter analyze
• cd apps/mobile_chat_app && flutter test -d chrome test/composer_bar_test.dart
• apps/node_backend/node_modules/.bin/js-yaml docs/code_maps/feature_map.yaml
• apps/node_backend/node_modules/.bin/js-yaml docs/code_maps/logic_map.yaml
• git diff --check

Notes

• This branch was cut from the current local main, so it also contains the prior local task-status cleanup commit 8fc9c74.

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[Copilot]

Pull request overview

This PR enhances the Bricks chat composer and Resources UX by adding desktop-friendly keyboard behavior, web clipboard image paste routed through the existing draft upload pipeline, and inline editing for todo/note resource previews. It also updates task lifecycle docs and code maps to reflect the new feature surfaces and regression risks.

Changes:

• Add Shift+Enter newline insertion while keeping Enter as “send” in the composer, with widget test coverage.
• Add Flutter Web clipboard image paste handling and connect it to the existing draft image upload flow (with lifecycle safety guards).
• Make Resources previews editable for todo checkboxes and note Markdown (toolbar + edit/preview + save), including refresh callbacks and widget tests; update tasks + code maps accordingly.

Reviewed changes

Copilot reviewed 15 out of 23 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
docs/tasks/done/2026-07-03-17-41-CST-pr-286-code-review-fixes.md	Documents the follow-up review scope and acceptance criteria for PR 286 fixes.
docs/tasks/done/2026-07-03-17-14-CST-task-status-cleanup.md	Records the task lifecycle cleanup and validation steps.
docs/tasks/done/2026-07-03-15-47-CST-editable-todo-and-note-resources.md	Captures requirements/AC for editable todo + note resources.
docs/tasks/done/2026-07-03-14-54-CST-puzzle-pack-maker-app-shell.md	Task moved to done/; referenced by code maps.
docs/tasks/done/2026-07-03-09-58-CST-chat-input-shift-enter-newline.md	Task artifact for Shift+Enter behavior.
docs/tasks/done/2026-07-02-12-49-CST-paste-image-upload-flow.md	Task artifact for paste-image upload parity with normal uploads.
docs/tasks/done/2026-06-30-16-39-CST-dokku-preview-github-deployment-button.md	Task moved to done/; referenced by code maps.
docs/tasks/done/2026-06-30-15-23-CST-flutter-web-static-cache.md	Task moved to done/; referenced by code maps.
docs/tasks/done/2026-06-30-15-02-CST-auth-limiter-scope.md	Task moved to done/; referenced by code maps.
docs/tasks/done/2026-06-30-14-33-CST-media-fullscreen-download-action.md	Task moved to done/; referenced by code maps.
docs/tasks/done/2026-06-30-13-09-CST-media-preview-download-actions.md	Task moved to done/; referenced by code maps.
docs/code_maps/logic_map.yaml	Updates logic index/doc/test references and change risks for composer paste + Shift+Enter + editable resources.
docs/code_maps/feature_map.yaml	Updates product smoke checks and entry paths for Shift+Enter, paste-image upload, and editable resource previews.
apps/mobile_chat_app/test/composer_bar_test.dart	Adds widget tests for Shift+Enter newline vs Enter send.
apps/mobile_chat_app/test/chat_navigation_page_test.dart	Adds widget tests for todo checkbox editing + note markdown editing/preview/save/failure behavior.
apps/mobile_chat_app/lib/features/chat/widgets/composer_pasted_image.dart	Introduces pasted-image payload model + subscription interface.
apps/mobile_chat_app/lib/features/chat/widgets/composer_paste_image.dart	Adds conditional-import façade for paste-image listening (web vs stub).
apps/mobile_chat_app/lib/features/chat/widgets/composer_paste_image_web.dart	Implements Flutter Web paste listener to extract clipboard images and emit base64 payloads.
apps/mobile_chat_app/lib/features/chat/widgets/composer_paste_image_stub.dart	No-op implementation for non-web platforms.
apps/mobile_chat_app/lib/features/chat/widgets/composer_bar.dart	Wires paste-image subscription + callback; adds Shortcuts/Actions for Enter vs Shift+Enter.
apps/mobile_chat_app/lib/features/chat/note_api_service.dart	Adds updateNote API client method for PATCHing note fields.
apps/mobile_chat_app/lib/features/chat/chat_screen.dart	Routes composer pasted-image events into the existing draft upload pipeline with generation/mounted guards.
apps/mobile_chat_app/lib/features/chat/chat_navigation_page.dart	Adds editable todo and note resource previews, including markdown toolbar, edit/preview toggle, save, and refresh callback.

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