feat: 按 Vault 隔离桌面检索投影与任务链接

backend/app/services/desktop_projection.py

@@ -0,0 +1,65 @@
+"""Rebuildable per-Vault FTS projection, sourced only through the Host broker."""
+from __future__ import annotations
+import asyncio
+from app import repository
+from app.database.db import connect_knowledge, transaction
+from app.knowledge.parser import parse_note
+from app.services import desktop_notes
+from app.services.coordination import vault_mutation_lock
+
+
+def entries():
+    result, offset = [], 0
+    while True:
+        page = desktop_notes.call('list', offset=offset, limit=1000)
+        result.extend(page['items'])
+        offset += len(page['items'])
+        if offset >= page['total'] or not page['items']: return result
+
+
+def _refresh():
+    current = entries()  # Always validates authorization, including when the cache is current.
+    conn = connect_knowledge()
+    try:
+        conn.execute('CREATE TABLE IF NOT EXISTS host_projection (file_id TEXT PRIMARY KEY, hash TEXT NOT NULL, path TEXT NOT NULL)')
+        old = {row['file_id']: (row['hash'], row['path']) for row in conn.execute('SELECT * FROM host_projection')}
+        changed = []
+        for entry in current:
+            if old.get(entry['file_id']) == (entry['hash'], entry['path']): continue
+            document = desktop_notes.call('read', file_id=entry['file_id'])
+            note = desktop_notes.note_from_document(document)
+            parsed = parse_note(markdown=note.markdown, file_path=note.file_path,
+                                folder=note.file_path.rpartition('/')[0], note_id=note.note_id,
+                                tags=note.tags, created_at=note.created_at, updated_at=note.updated_at)
+            changed.append((document, parsed))
+        removed = set(old) - {entry['file_id'] for entry in current}
+        # Content is verified before starting the projection transaction. No model/network IO inside.
+        with transaction(conn):
+            for file_id in removed:
+                for block_id in repository.delete_note(file_id, conn=conn):
+                    conn.execute('DELETE FROM vec_blocks WHERE block_id=?', [block_id])
+                conn.execute('DELETE FROM host_projection WHERE file_id=?', [file_id])
+            for document, parsed in changed:
+                old_ids = repository.replace_note_metadata(conn=conn, note_id=parsed.note_id, title=parsed.title,
+                    file_path=parsed.file_path, folder=parsed.folder, tags=parsed.tags, created_at=parsed.created_at,
+                    updated_at=parsed.updated_at, blocks=parsed.blocks)
+                for block_id in old_ids:
+                    conn.execute('DELETE FROM vec_blocks WHERE block_id=?', [block_id])
+                conn.execute('UPDATE blocks SET embedding_local_only=? WHERE note_id=?', (int(parsed.embedding_local_only), parsed.note_id))
+                conn.execute('INSERT OR REPLACE INTO host_projection VALUES (?,?,?)', (parsed.note_id, document['hash'], parsed.file_path))
+            if removed or changed:
+                repository.set_index_meta({'workspace_vectors_pending': '1'}, conn=conn)
+    finally:
+        conn.close()
+
+
+async def refresh():
+    async with vault_mutation_lock():
+        work = asyncio.create_task(asyncio.to_thread(_refresh))
+        # Keep the projection gate until the worker has finished even if the request is cancelled.
+        cancelled = False
+        while not work.done():
+            try: await asyncio.shield(work)
+            except asyncio.CancelledError: cancelled = True
+        work.result()
+        if cancelled: raise asyncio.CancelledError

backend/app/services/index_service.py

@@ -16,7 +16,7 @@ from app.contracts import IndexJob, IndexRebuildRequest, IndexStatus
 from app.errors import ApiError
 from app.knowledge.parser import parse_note
 from app.services.note_service import index_note, prepare_note_index
-from app.database.db import connect, transaction
+from app.database.db import connect_knowledge as connect, transaction
 from app.services.coordination import vault_mutation_lock
 from app.retrieval.vectorstore import SqliteVecStore
 from app.local_models.runtime import LocalEmbedding
@@ -47,6 +47,14 @@ def _scan_vault() -> list[tuple[str, str, str, datetime, datetime]]:
 
     先读入内存：若文件读取失败，rebuild 尚未清空旧索引，不会造成数据损失。
     """
+    if get_settings().environment == 'desktop':
+        from app.services.desktop_projection import entries
+        from app.services import desktop_notes
+        result = []
+        for entry in entries():
+            note = desktop_notes.note_from_document(desktop_notes.call('read', file_id=entry['file_id']))
+            result.append((note.file_path, note.file_path.rpartition('/')[0], note.markdown, note.created_at, note.updated_at))
+        return result
     vault = get_settings().vault_path.resolve()
     result: list[tuple[str, str, str, datetime, datetime]] = []
     if not vault.exists():
@@ -80,8 +88,12 @@ async def rebuild(request: IndexRebuildRequest) -> IndexJob:
             {"scope": request.scope, "note_ids": request.note_ids},
         )
 
+    if get_settings().environment == 'desktop':
+        from app.services.desktop_projection import refresh
+        await refresh()
     docs = _scan_vault()
-    saved_records = {key: repository.get_note_record(key) for key in _pending_notes()}
+    record_ids = [entry.note_id for entry in repository.list_note_locations()] if get_settings().environment == 'desktop' else _pending_notes()
+    saved_records = {key: repository.get_note_record(key) for key in record_ids}
     saved_paths = {record.file_path: record for record in saved_records.values() if record is not None}
 
     _active_job_id = job_id
@@ -117,7 +129,8 @@ async def rebuild(request: IndexRebuildRequest) -> IndexJob:
         # All network/model awaits precede the transaction. The concrete SQLite
         # methods below complete synchronously despite their async interfaces.
         async with vault_mutation_lock():
-            if _scan_vault() != docs or saved_records != {key: repository.get_note_record(key) for key in _pending_notes()}:
+            current_ids = [entry.note_id for entry in repository.list_note_locations()] if get_settings().environment == 'desktop' else _pending_notes()
+            if _scan_vault() != docs or saved_records != {key: repository.get_note_record(key) for key in current_ids}:
                 raise ApiError(409, "INDEX_SNAPSHOT_CHANGED", "笔记在计算期间发生变化，稍后重新计算。")
             conn = connect()
             try:

backend/app/services/note_service.py

@@ -14,7 +14,7 @@ from uuid import uuid4
 
 from app import repository
 from app.contracts import Note, NoteBlock, NoteSummary
-from app.database.db import connect, transaction
+from app.database.db import connect_knowledge as connect, transaction
 from app.errors import ApiError
 from app.knowledge.parser import ParsedNote, parse_note
 from app.local_models.runtime import LocalEmbedding, background_embeddings

backend/app/services/task_service.py

@@ -9,7 +9,7 @@ from weakref import WeakKeyDictionary
 
 from app import repository
 from app.contracts import Task, TaskStatus
-from app.database.db import connect, transaction
+from app.database.db import connect_knowledge as connect, transaction
 from app.errors import ApiError
 from app.operation_logs import log_event
 
@@ -39,6 +39,13 @@ def _now() -> datetime:
     return datetime.now(timezone.utc)
 
 
+def _prepare_note_link(note_id: str | None) -> None:
+    from app.config import get_settings
+    if note_id and get_settings().environment == 'desktop':
+        from app.services.desktop_projection import _refresh
+        _refresh()
+
+
 def _task_from_row(row) -> Task:
     return Task(
         task_id=row["task_id"],
@@ -56,6 +63,7 @@ def create_task(
     *, title: str, description: str = "", note_id: str | None = None,
     due_at: datetime | None = None,
 ) -> Task:
+    _prepare_note_link(note_id)
     if note_id and repository.get_note_record(note_id) is None:
         raise ApiError(404, "RESOURCE_NOT_FOUND", "note not found", {"note_id": note_id})
     task_id = f"task_{uuid4().hex}"
@@ -109,6 +117,7 @@ def update_task(task_id: str, values: dict[str, object]) -> Task:
         raise ApiError(404, "RESOURCE_NOT_FOUND", "task not found", {"task_id": task_id})
     if "note_id" in values and values["note_id"]:
         note_id = str(values["note_id"])
+        _prepare_note_link(note_id)
         if repository.get_note_record(note_id) is None:
             raise ApiError(404, "RESOURCE_NOT_FOUND", "note not found", {"note_id": note_id})
     if values.get("title") is None: