Add Termux Remote File Manager: SSH-based file browsing, transfer, editing, and preview with zero re-authentication

.gitignore

@@ -37,3 +37,39 @@ local.properties
 .swp
 ehthumbs.db
 Thumbs.db
+
+# ── GSD baseline (auto-generated) ──
+.gsd
+.agents/
+.claude/
+.trae/
+.bg-shell/
+e2e-evidence/
+.mcp.json
+skills-lock.json
+vision.md
+github_key
+问题收集.md
+clear_and_stream.sh
+screenshot_folder.png
+=
+scripts/
+*~
+.vscode/
+*.code-workspace
+.env
+.env.*
+!.env.example
+node_modules/
+.next/
+dist/
+__pycache__/
+*.pyc
+.venv/
+venv/
+target/
+vendor/
+*.log
+coverage/
+.cache/
+tmp/

app/build.gradle

@@ -36,6 +36,9 @@ android {
         implementation "io.noties.markwon:recycler:$markwonVersion"
         implementation 'com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava'
 
+        // PhotoView for image preview with pinch-to-zoom and pan support
+        implementation 'com.github.chrisbanes:PhotoView:2.3.0'
+
         implementation project(":terminal-view")
         implementation project(":termux-shared")
     }

app/src/main/AndroidManifest.xml

@@ -102,6 +102,34 @@
             android:label="@string/title_activity_termux_settings"
             android:theme="@style/Theme.TermuxApp.DayNight.NoActionBar" />
 
+        <activity
+            android:name=".app.activities.RemoteFileBrowserActivity"
+            android:exported="false"
+            android:label="@string/title_remote_file_browser"
+            android:parentActivityName=".app.TermuxActivity"
+            android:resizeableActivity="true"
+            android:theme="@style/Theme.RemoteFileBrowser.DayNight.NoActionBar"
+            tools:targetApi="n" />
+
+        <activity
+            android:name=".app.activities.RemoteCodeEditorActivity"
+            android:exported="false"
+            android:label="@string/title_code_editor"
+            android:parentActivityName=".app.activities.RemoteFileBrowserActivity"
+            android:resizeableActivity="true"
+            android:windowSoftInputMode="adjustResize"
+            android:theme="@style/Theme.RemoteFileBrowser.DayNight.NoActionBar"
+            tools:targetApi="n" />
+
+        <activity
+            android:name=".app.activities.RemoteImagePreviewActivity"
+            android:exported="false"
+            android:label="@string/title_image_preview"
+            android:parentActivityName=".app.activities.RemoteFileBrowserActivity"
+            android:resizeableActivity="true"
+            android:theme="@style/Theme.RemoteFileBrowser.DayNight.NoActionBar"
+            tools:targetApi="n" />
+
         <activity
             android:name=".shared.activities.ReportActivity"
             android:theme="@style/Theme.MarkdownViewActivity.DayNight"