fix(bridge): resolve data dir same as Python for sync-result.json

Both readSyncResult() and probeAll() now mirror Python's
_resolve_data_dir() logic: dev detection (cwd/.obsidian-rag
or cwd/KnowledgeVault) then home dir fallback.

Previously readSyncResult always used cwd/.obsidian-rag (wrong for
server deployments) and probeAll resolved sync-result.json relative
to db path (wrong for absolute paths like /home/san/.obsidian-rag/).

src/services/health.ts

@@ -98,7 +98,8 @@ export async function probeAll(config: ObsidianRagConfig): Promise<ProbeResult>
 
   if (indexExists) {
     try {
-      const syncPath = resolve(dbPath, "..", "sync-result.json");
+      const dataDir = resolveDataDir();
+      const syncPath = resolve(dataDir, "sync-result.json");
       if (existsSync(syncPath)) {
         const data = JSON.parse(readFileSync(syncPath, "utf-8"));
         lastSync = data.timestamp ?? null;
@@ -120,6 +121,17 @@ export async function probeAll(config: ObsidianRagConfig): Promise<ProbeResult>
   };
 }
 
+function resolveDataDir(): string {
+  const cwd = process.cwd();
+  const devDataDir = resolve(cwd, ".obsidian-rag");
+  const devVaultMarker = resolve(cwd, "KnowledgeVault");
+  if (existsSync(devDataDir) || existsSync(devVaultMarker)) {
+    return devDataDir;
+  }
+  const home = process.env.HOME ?? process.env.USERPROFILE ?? "";
+  return resolve(home, ".obsidian-rag");
+}
+
 async function probeOllama(baseUrl: string): Promise<boolean> {
   try {
     const res = await fetch(`${baseUrl}/api/tags`, { signal: AbortSignal.timeout(3000) });

src/services/indexer-bridge.ts

@@ -109,7 +109,7 @@ export function readSyncResult(config: ObsidianRagConfig): {
   total_chunks: number;
   errors: Array<{ file: string; error: string }>;
 } | null {
-  const dataDir = resolve(process.cwd(), ".obsidian-rag");
+  const dataDir = _resolveDataDir();
   const path = resolve(dataDir, "sync-result.json");
   if (!existsSync(path)) return null;
   try {
@@ -118,3 +118,14 @@ export function readSyncResult(config: ObsidianRagConfig): {
     return null;
   }
 }
+
+function _resolveDataDir(): string {
+  const cwd = process.cwd();
+  const devDataDir = resolve(cwd, ".obsidian-rag");
+  const devVaultMarker = resolve(cwd, "KnowledgeVault");
+  if (existsSync(devDataDir) || existsSync(devVaultMarker)) {
+    return devDataDir;
+  }
+  const home = process.env.HOME ?? process.env.USERPROFILE ?? "";
+  return resolve(home, ".obsidian-rag");
+}