Update VS Code extension plan with CodeLens implementation

Author: nickprotop

VSCODE_EXTENSION_PLAN.md

@@ -1,6 +1,6 @@
 # VS Code Extension - Feature Status
 
-**Last Updated**: 2025-11-30
+**Last Updated**: 2025-12-01
 
 ---
 
@@ -13,6 +13,7 @@
 | ✅ Resx Diagnostics | `resxDiagnostics.ts` | Validation for .resx files (duplicates, empty values) |
 | ✅ Completion Provider | `completionProvider.ts` | IntelliSense autocomplete for localization keys |
 | ✅ Quick Fix Provider | `quickFix.ts` | Code actions (add key, merge duplicates, translate) |
+| ✅ CodeLens Provider | `codeLens.ts` | Inline info (references, coverage, translate) in .resx and code files |
 
 ### Views
 | Feature | File | Description |
@@ -22,14 +23,16 @@
 | ✅ Resource Tree | `resourceTreeView.ts` | Explorer sidebar with keys/translations |
 | ✅ Status Bar | `statusBar.ts` | Coverage %, validation status, service status |
 | ✅ Settings Panel | `settingsPanel.ts` | Full lrm.json configuration (all options exposed) |
+| ✅ Provider Testing | `settingsPanel.ts` | Test Connection button calls API to validate credentials |
 
 ### Backend
 | Feature | File | Description |
 |---------|------|-------------|
 | ✅ API Client | `apiClient.ts` | Complete REST API wrapper for all endpoints |
 | ✅ LRM Service | `lrmService.ts` | Backend process management with auto-restart |
+| ✅ Cache Service | `cacheService.ts` | Shared cache for scan results, key details, validation |
 
-### Commands (20 total)
+### Commands (25 total)
 - ✅ `lrm.scanCode` - Full codebase scan
 - ✅ `lrm.validateResources` - Validate all .resx files
 - ✅ `lrm.openResourceEditor` - Open editor panel
@@ -50,37 +53,24 @@
 - ✅ `lrm.mergeDuplicateKey` - Quick fix: merge
 - ✅ `lrm.translateKeyQuickFix` - Quick fix: translate
 - ✅ `lrm.showResourceTree` - Focus tree view
+- ✅ `lrm.showKeyReferences` - CodeLens: show references
+- ✅ `lrm.showMissingLanguages` - CodeLens: show missing languages
+- ✅ `lrm.translateKeyFromLens` - CodeLens: translate key
+- ✅ `lrm.editKeyFromLens` - CodeLens: edit key
+- ✅ `lrm.deleteUnusedKey` - CodeLens: delete unused key
 
 ---
 
 ## Pending Features
 
-### 1. Provider Testing 🟡 MEDIUM PRIORITY
-
-**Current:** `testProvider()` in `settingsPanel.ts` is a stub
-**Needed:** Call API to validate provider credentials work
-
----
-
-### 2. CodeLens Provider 🟢 LOW PRIORITY
-
-Show reference count above each key in .resx files:
-```xml
-<!-- 12 references -->
-<data name="WelcomeMessage">
-```
-**File to create:** `src/providers/codeLens.ts`
-
----
-
-### 3. Definition Provider 🟢 LOW PRIORITY
+### 1. Definition Provider 🟢 LOW PRIORITY
 
 F12 from code to jump to .resx file definition
 **File to create:** `src/providers/definition.ts`
 
 ---
 
-### 4. Reference Provider 🟢 LOW PRIORITY
+### 2. Reference Provider 🟢 LOW PRIORITY
 
 Shift+F12 to find all code references for a key
 **File to create:** `src/providers/references.ts`
@@ -97,7 +87,7 @@ vscode-extension/
 │   │   ├── resxDiagnostics.ts      ✅
 │   │   ├── completionProvider.ts   ✅
 │   │   ├── quickFix.ts             ✅
-│   │   ├── codeLens.ts             ⬜ (not implemented)
+│   │   ├── codeLens.ts             ✅
 │   │   ├── definition.ts           ⬜ (not implemented)
 │   │   └── references.ts           ⬜ (not implemented)
 │   ├── views/
@@ -108,6 +98,7 @@ vscode-extension/
 │   │   └── statusBar.ts            ✅
 │   ├── backend/
 │   │   ├── apiClient.ts            ✅
+│   │   ├── cacheService.ts         ✅
 │   │   └── lrmService.ts           ✅
 │   └── extension.ts                ✅
 ├── package.json                    ✅