docs(bf-3fka4): add verification note

Verification note confirming the crate was already scaffolded
in commit 6365d3f4. Bead is being closed.

notes/bf-3fka4.md

@@ -0,0 +1,73 @@
+# bf-3fka4: Scaffold pdftract-inspector-ui crate
+
+## Status
+
+**COMPLETE** — Work already done in commit `6365d3f4`.
+
+## What was implemented
+
+The `crates/pdftract-inspector-ui` crate was created with the following structure:
+
+### Files created
+
+1. **`Cargo.toml`** — Workspace member configuration
+   - Library crate: `pdftract_inspector_ui`
+   - Build dependency: `flate2` for gzip compression
+
+2. **`build.rs`** — Bundling and size validation
+   - Reads `static/index.html`, `static/style.css`, `static/app.js`
+   - Concatenates into a single bundle
+   - Computes gzipped size and enforces 80 KB limit (Phase 7.9.3)
+   - Fails build if bundle exceeds limit
+
+3. **`src/lib.rs`** — Rust API
+   - `INDEX_HTML: &[u8]` — Bundled HTML via `include_bytes!`
+   - `STYLE_CSS: &[u8]` — Bundled CSS via `include_bytes!`
+   - `APP_JS: &[u8]` — Bundled JS via `include_bytes!`
+   - Tests verify files are non-empty
+
+4. **`static/index.html`** — HTML stub
+   - Basic HTML5 structure
+   - Links to `style.css` and `app.js`
+   - Placeholder for PDF viewer
+
+5. **`static/app.js`** — JavaScript stub
+   - Basic IIFE pattern
+   - Placeholder for Phase 7.9 implementation
+
+6. **`static/style.css`** — CSS stub
+   - Minimal styling for header, viewer, footer
+   - Placeholder for Phase 7.9 implementation
+
+### Build verification
+
+```bash
+$ cargo check -p pdftract-inspector-ui
+   Compiling pdftract-inspector-ui v0.1.0 (...)
+warning: pdftract-inspector-ui@0.1.0: Inspector frontend bundle size:
+warning: pdftract-inspector-ui@0.1.0:   Raw: 1.95 KB
+warning: pdftract-inspector-ui@0.1.0:   Gzipped: 0.87 KB / 80 KB limit
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 30.80s
+```
+
+- Bundle size: 0.87 KB gzipped (well under 80 KB limit)
+- Compiles successfully
+
+### Acceptance criteria
+
+| Criterion | Status |
+|-----------|--------|
+| Create workspace member | PASS — Added to `Cargo.toml` members |
+| Minimal build.rs | PASS — Bundles HTML/CSS/JS with gzip validation |
+| include_bytes! frontend stub | PASS — All three assets in `src/lib.rs` |
+| Crate compiles | PASS — `cargo check` succeeds |
+| Bundle size enforced | PASS — 80 KB limit in build.rs |
+
+## References
+
+- Plan Phase 7.9: Inspector mode
+- Related beads: Phase 7.9 Inspector coordinator (needs this crate)
+
+## Commit
+
+- `6365d3f4` — feat(bf-3fka4): scaffold pdftract-inspector-ui crate