semi implemented and features implemented save checkpoint

docs/features/unchecked/web/backport-resolution-ui-with-function-diff-viewer.md

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+# Backport Resolution UI with Function Diff Viewer
+
+## Module
+Web
+
+## Status
+IMPLEMENTED
+
+## Description
+Frontend UI for browsing binary backport resolution results. Includes a ResolutionChipComponent (showing resolved/unresolved status), an EvidenceDrawerComponent (side panel with proof artifacts), and a FunctionDiffComponent (displaying function-level binary diffs between patched and unpatched versions). Integrates into the vulnerability detail view with e2e test coverage.
+
+## Implementation Details
+- **Feature directory**: `src/Web/StellaOps.Web/src/app/shared/components/function-diff/`
+- **Components**:
+  - `function-diff` (`src/Web/StellaOps.Web/src/app/shared/components/function-diff/function-diff.component.ts`)
+- **Source**: SPRINT_1227_0003_0001_FE_backport_ui.md
+
+## E2E Test Plan
+- **Setup**:
+  - [ ] Log in with a user that has appropriate permissions
+  - [ ] Navigate to the relevant page/section where this feature appears
+  - [ ] Ensure test data exists (scanned artifacts, SBOM data, or seed data as needed)
+- **Core verification**:
+  - [ ] Verify side-by-side comparison view renders correctly with two versions
+  - [ ] Verify additions, removals, and changes are visually highlighted
+  - [ ] Verify diff data matches the expected delta between versions
+- **Edge cases**:
+  - [ ] Verify graceful handling when backend API is unavailable (error state)
+  - [ ] Verify responsive layout at different viewport sizes
+  - [ ] Verify accessibility (keyboard navigation, screen reader labels, ARIA attributes)