feat(desktop): wire remote filesystem browsing

apps/desktop/src/lib/desktop-fs.ts

@@ -23,7 +23,7 @@ export function desktopFsCacheKey() {
   return connectionCacheKey($connection.get())
 }
 
-function isRemoteMode() {
+export function isDesktopFsRemoteMode() {
   return $connection.get()?.mode === 'remote'
 }
 
@@ -41,7 +41,7 @@ function bridge() {
 
 export async function readDesktopDir(path: string): Promise<HermesReadDirResult> {
   const desktop = bridge()
-  if (!isRemoteMode()) {
+  if (!isDesktopFsRemoteMode()) {
     return desktop.readDir(path)
   }
   return desktop.api<HermesReadDirResult>({ path: fsPath('list', path) })
@@ -49,7 +49,7 @@ export async function readDesktopDir(path: string): Promise<HermesReadDirResult>
 
 export async function readDesktopFileText(path: string): Promise<HermesReadFileTextResult> {
   const desktop = bridge()
-  if (!isRemoteMode()) {
+  if (!isDesktopFsRemoteMode()) {
     return desktop.readFileText(path)
   }
   return desktop.api<HermesReadFileTextResult>({ path: fsPath('read-text', path) })
@@ -57,7 +57,7 @@ export async function readDesktopFileText(path: string): Promise<HermesReadFileT
 
 export async function readDesktopFileDataUrl(path: string): Promise<string> {
   const desktop = bridge()
-  if (!isRemoteMode()) {
+  if (!isDesktopFsRemoteMode()) {
     return desktop.readFileDataUrl(path)
   }
 
@@ -67,7 +67,7 @@ export async function readDesktopFileDataUrl(path: string): Promise<string> {
 
 export async function desktopGitRoot(path: string): Promise<string | null> {
   const desktop = bridge()
-  if (!isRemoteMode()) {
+  if (!isDesktopFsRemoteMode()) {
     return desktop.gitRoot ? desktop.gitRoot(path) : null
   }
 
@@ -77,7 +77,7 @@ export async function desktopGitRoot(path: string): Promise<string | null> {
 
 export async function selectDesktopPaths(options?: HermesSelectPathsOptions): Promise<string[]> {
   const desktop = bridge()
-  if (!isRemoteMode()) {
+  if (!isDesktopFsRemoteMode()) {
     return desktop.selectPaths(options)
   }
   return remotePicker ? remotePicker.selectPaths(options) : []

apps/desktop/src/lib/local-preview.ts

@@ -1,3 +1,4 @@
+import { isDesktopFsRemoteMode, readDesktopFileText } from '@/lib/desktop-fs'
 import type { PreviewTarget } from '@/store/preview'
 
 const HTML_EXTENSIONS = new Set(['.htm', '.html'])
@@ -107,6 +108,26 @@ export function localPreviewTarget(rawTarget: string, cwd?: string | null): Prev
   }
 }
 
+async function enrichPreviewTarget(target: PreviewTarget | null): Promise<PreviewTarget | null> {
+  if (!isDesktopFsRemoteMode() || !target || target.kind !== 'file' || target.previewKind === 'image') {
+    return target
+  }
+
+  try {
+    const result = await readDesktopFileText(target.path || target.source)
+    return {
+      ...target,
+      binary: result.binary,
+      byteSize: result.byteSize,
+      language: result.language || target.language,
+      large: (result.byteSize ?? 0) > 512 * 1024,
+      mimeType: result.mimeType
+    }
+  } catch {
+    return target
+  }
+}
+
 export async function normalizeOrLocalPreviewTarget(
   rawTarget: string,
   cwd?: string | null
@@ -115,12 +136,12 @@ export async function normalizeOrLocalPreviewTarget(
     const normalized = await window.hermesDesktop?.normalizePreviewTarget?.(rawTarget, cwd || undefined)
 
     if (normalized) {
-      return normalized
+      return enrichPreviewTarget(normalized)
     }
   } catch {
     // Running Electron may still have the old HTML-only preview IPC. Fall
     // through to renderer-side local classification so text/images still open.
   }
 
-  return localPreviewTarget(rawTarget, cwd)
+  return enrichPreviewTarget(localPreviewTarget(rawTarget, cwd))
 }