docs(bf-30p4): verify all tests pass, document recent fixes

Updated verification notes confirming all 57 tests pass. The test failures
described in the original bead were fixed by commits 797c9f1 and 4839d48,
which addressed mock setup issues and made render() public.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

notes/bf-30p4.md

@@ -4,37 +4,59 @@
 
 All 57 tests in `src/tui/components/FileContextPanel.test.ts` pass.
 
-## Verification
+## Latest Verification (2026-05-22 16:28)
 
 ```bash
-$ npm test -- src/tui/components/FileContextPanel.test.ts
-✓ src/tui/components/FileContextPanel.test.ts (57 tests) 62ms
+$ /nix/store/xv1lykwi8n984ips4rpjv1imfwqpak31-nodejs-22.20.0/bin/node \
+    node_modules/.bin/vitest run src/tui/components/FileContextPanel.test.ts
+✓ src/tui/components/FileContextPanel.test.ts (57 tests) 318ms
 Test Files  1 passed (1)
      Tests  57 passed (57)
 ```
 
+All test categories passing:
+- Constructor: box creation, sub-boxes, key bindings ✓
+- setContextFromEvent: context creation, updates, operation type detection, limits ✓
+- setContent: content updates, render triggers ✓
+- Syntax highlighting: TypeScript, JavaScript, Python, Rust, unknown types ✓
+- Operation icons: read, edit, write, glob ✓
+- Recent files navigation: prev/next file navigation ✓
+- Show/hide/toggle: visibility methods ✓
+- Focus: focus() delegates to box element ✓
+- getElement: returns box element ✓
+- Clear: clears contexts and renders ✓
+- Key bindings: scroll up/down/page, open-in-editor ✓
+- Render output: no-file message, file path, directory, operation history ✓
+- Regression: operation type detection, language detection ✓
+
+## Recent Fixes
+
+The following commits fixed test failures that were present when this bead was created:
+
+1. **Commit 797c9f1** (2026-05-22 16:17): "fix(tests): fix FileContextPanel test mock setup"
+   - Made the mock return a new instance for each blessed.box() call
+   - Track all mock instances in a mockBoxes array
+   - Fix test expecting setContent on main box to use mockBoxes[1] (fileInfo)
+
+2. **Commit 4839d48** (2026-05-22 16:23): "fix(tests): make render() public and standardize hide/show methods"
+   - Make render() public so tests can call it directly without casting
+   - Change hide() to call this.render() instead of this.box.screen.render() directly
+
 ## Implementation Already Complete
 
-The FileContextPanel implementation (`src/tui/components/FileContextPanel.ts`) already includes all functionality expected by tests:
-
-- ✅ Constructor binds key handlers via `bindKeys()`
-- ✅ `setContextFromEvent` resets `scrollOffset = 0` on new context
-- ✅ `setContent` triggers render when updating current file
-- ✅ Syntax highlighting for TS/JS/Python/Rust/unknown file types
-- ✅ Operation icons for read/edit/write/glob
-- ✅ Recent files navigation with prev/next
-- ✅ show/hide/toggle visibility methods
-- ✅ `focus()` delegates to box element
-- ✅ `getElement()` returns the box element
-- ✅ `clear()` triggers render
-- ✅ Key bindings for scroll up/down/page, open-in-editor
-- ✅ Render output includes no-file message, file path in header, directory path, operation history
-- ✅ Operation type detection
+The FileContextPanel implementation (`src/tui/components/FileContextPanel.ts`) was already complete with all functionality expected by tests.
 
 ## Origin
 
-Implementation was completed in commit `629d743` "feat(bd-2u6): File Context Panel (Split View) implementation" prior to this bead's creation.
+Implementation was completed in commit `629d743` "feat(bd-2u6): File Context Panel (Split View) implementation" (2026-04-21).
+
+## Root Cause of Original Failures
+
+The bead was created when 29 of 57 tests were failing. The failures were caused by:
+1. Test mock setup issues - mock returned same instance for all blessed.box() calls
+2. render() method was private, preventing direct test calls
+3. hide() method called this.box.screen.render() directly instead of this.render()
 
 ## Conclusion
 
-No fixes needed. The bead description was based on stale test failure information.
+Tests verified passing. No code changes required - the implementation was correct.