✨ grammar checker

src/renderer/components/Toolbar/AnalysisToolbar.tsx

@@ -363,6 +363,34 @@ export function AnalysisToolbar(): JSX.Element {
     }
   }
 
+  const runGrammar = async (): Promise<void> => {
+    if (!hasFile || isAILoading) return
+    setAILoading(true)
+    setAIError(null)
+    setAnalysisMode('none')
+    try {
+      const matches = await window.api.checkGrammar(activeFileContent)
+      const newAnnotations = matches.map((m) => {
+        const matched = activeFileContent.slice(m.offset, m.offset + m.length)
+        return {
+          id: `grammar-${m.offset}-${m.ruleId}`,
+          type: 'grammar' as const,
+          from: m.offset,
+          to: m.offset + m.length,
+          matchedText: matched,
+          message: m.message,
+          suggestion: m.replacement ?? undefined,
+        }
+      })
+      const existing = useEditorStore.getState().annotations.filter((a) => a.type !== 'grammar')
+      setAnnotations([...existing, ...newAnnotations])
+    } catch (err) {
+      setAIError(err instanceof Error ? err.message : 'Grammar check failed')
+    } finally {
+      setAILoading(false)
+    }
+  }
+
   const passiveCount = annotations.filter((a) => a.type === 'passive_voice').length
   const pastProgressiveCount = annotations.filter((a) => a.type === 'past_progressive').length
   const weakVerbsCount = annotations.filter((a) => a.type === 'weak_verbs').length
@@ -371,7 +399,8 @@ export function AnalysisToolbar(): JSX.Element {
   const styleCount = annotations.filter((a) => a.type === 'style').length
   const showTellCount = annotations.filter((a) => a.type === 'show_tell').length
   const critiqueCount = annotations.filter((a) => a.type === 'critique').length
-  const totalCount = passiveCount + pastProgressiveCount + weakVerbsCount + clichesCount + consistencyCount + styleCount + showTellCount + critiqueCount
+  const grammarCount = annotations.filter((a) => a.type === 'grammar').length
+  const totalCount = passiveCount + pastProgressiveCount + weakVerbsCount + clichesCount + consistencyCount + styleCount + showTellCount + critiqueCount + grammarCount
   const anyActive = Boolean(analysisMode)
   const sentenceStats = activeFileContent ? computeSentenceStats(activeFileContent) : null
   const paragraphRhythm = activeFileContent ? computeParagraphRhythm(activeFileContent) : []
@@ -506,6 +535,14 @@ export function AnalysisToolbar(): JSX.Element {
                       <span>Critique</span>
                       {critiqueCount > 0 && <span className="toolbar-analyze-count">{critiqueCount}</span>}
                     </button>
+                    <div className="context-menu-separator" />
+                    <button
+                      className="context-menu-item"
+                      onClick={() => { setAnalyzeOpen(false); void runGrammar() }}
+                    >
+                      <span>Grammar</span>
+                      {grammarCount > 0 && <span className="toolbar-analyze-count">{grammarCount}</span>}
+                    </button>
                   </div>
                 )
               })(),