fix: pass active note content directly to AI context builder

In Tauri mode, allContent is {} (empty) until a note is explicitly
saved. The previous mergeTabContent fix enriched allContent with tab
content, but the indirection was fragile. This fix passes the active
tab's content directly to buildContextSnapshot as activeNoteContent,
which takes priority over allContent[path]. This ensures the AI always
receives the note body regardless of allContent state.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/AiPanel.tsx

@@ -16,6 +16,8 @@ interface AiPanelProps {
   onVaultChanged?: () => void
   vaultPath: string
   activeEntry?: VaultEntry | null
+  /** Direct content of the active note from the editor tab. */
+  activeNoteContent?: string | null
   entries?: VaultEntry[]
   allContent?: Record<string, string>
   openTabs?: VaultEntry[]
@@ -110,7 +112,7 @@ function MessageHistory({ messages, isActive, onOpenNote, onNavigateWikilink, ha
   )
 }
 
-export function AiPanel({ onClose, onOpenNote, onFileCreated, onFileModified, onVaultChanged, vaultPath, activeEntry, entries, allContent, openTabs, noteList, noteListFilter }: AiPanelProps) {
+export function AiPanel({ onClose, onOpenNote, onFileCreated, onFileModified, onVaultChanged, vaultPath, activeEntry, activeNoteContent, entries, allContent, openTabs, noteList, noteListFilter }: AiPanelProps) {
   const [input, setInput] = useState('')
   const [pendingRefs, setPendingRefs] = useState<NoteReference[]>([])
   const inputRef = useRef<HTMLInputElement>(null)
@@ -122,17 +124,18 @@ export function AiPanel({ onClose, onOpenNote, onFileCreated, onFileModified, on
   }, [activeEntry, entries])
 
   const contextPrompt = useMemo(() => {
-    if (!activeEntry || !allContent || !entries) return undefined
+    if (!activeEntry || !entries) return undefined
     return buildContextSnapshot({
       activeEntry,
-      allContent,
+      allContent: allContent ?? {},
+      activeNoteContent: activeNoteContent ?? undefined,
       openTabs,
       noteList,
       noteListFilter,
       entries,
       references: pendingRefs.length > 0 ? pendingRefs : undefined,
     })
-  }, [activeEntry, allContent, openTabs, noteList, noteListFilter, entries, pendingRefs])
+  }, [activeEntry, activeNoteContent, allContent, openTabs, noteList, noteListFilter, entries, pendingRefs])
 
   const fileCallbacks = useMemo<AgentFileCallbacks>(() => ({
     onFileCreated,

src/components/EditorRightPanel.tsx

@@ -51,6 +51,7 @@ export function EditorRightPanel({
           onVaultChanged={onVaultChanged}
           vaultPath={vaultPath}
           activeEntry={inspectorEntry}
+          activeNoteContent={inspectorContent}
           entries={entries}
           allContent={allContent}
           openTabs={openTabs}

src/utils/ai-context.test.ts

@@ -331,6 +331,35 @@ describe('buildContextSnapshot', () => {
     expect(json.noteList).toBeUndefined()
   })
 
+  it('uses activeNoteContent for body when allContent is empty (Tauri mode)', () => {
+    const emptyAllContent: Record<string, string> = {}
+    const result = buildContextSnapshot({
+      activeEntry: active,
+      allContent: emptyAllContent,
+      entries,
+      activeNoteContent: '---\ntitle: Alpha\n---\n\n# Alpha\nProject content from tab.',
+    })
+    const json = JSON.parse(result.split('```json\n')[1].split('\n```')[0])
+    expect(json.activeNote.body).toContain('Project content from tab.')
+  })
+
+  it('prefers activeNoteContent over allContent when both present', () => {
+    const result = buildContextSnapshot({
+      activeEntry: active,
+      allContent,
+      entries,
+      activeNoteContent: 'Fresh editor content',
+    })
+    const json = JSON.parse(result.split('```json\n')[1].split('\n```')[0])
+    expect(json.activeNote.body).toBe('Fresh editor content')
+  })
+
+  it('falls back to allContent when activeNoteContent is undefined', () => {
+    const result = buildContextSnapshot({ activeEntry: active, allContent, entries })
+    const json = JSON.parse(result.split('```json\n')[1].split('\n```')[0])
+    expect(json.activeNote.body).toBe('# Alpha\nProject content.')
+  })
+
   it('includes wikilink instruction in preamble', () => {
     const result = buildContextSnapshot({ activeEntry: active, allContent, entries })
     expect(result).toContain('[[Note Title]]')

src/utils/ai-context.ts

@@ -72,6 +72,8 @@ export interface NoteListItem {
 export interface ContextSnapshotParams {
   activeEntry: VaultEntry
   allContent: Record<string, string>
+  /** Direct content of the active note from the editor tab (most reliable source). */
+  activeNoteContent?: string
   openTabs?: VaultEntry[]
   noteList?: NoteListItem[]
   noteListFilter?: { type: string | null; query: string }
@@ -94,7 +96,7 @@ const MAX_NOTE_LIST_ITEMS = 100
 
 /** Build a structured context snapshot as a system prompt for Claude. */
 export function buildContextSnapshot(params: ContextSnapshotParams): string {
-  const { activeEntry, allContent, openTabs, noteList, noteListFilter, entries, references } = params
+  const { activeEntry, allContent, activeNoteContent, openTabs, noteList, noteListFilter, entries, references } = params
 
   const snapshot: Record<string, unknown> = {
     activeNote: {
@@ -102,7 +104,7 @@ export function buildContextSnapshot(params: ContextSnapshotParams): string {
       title: activeEntry.title,
       type: activeEntry.isA ?? 'Note',
       frontmatter: entryFrontmatter(activeEntry),
-      body: allContent[activeEntry.path] ?? '',
+      body: activeNoteContent ?? allContent[activeEntry.path] ?? '',
     },
   }