Add dev-server feature flag for local development

- Add `dev-server` Cargo feature to switch between localhost and production API
- Update Taskfile with `task dev` (dev server) and `task dev:prod` (prod API)
- Add `task build:dev` for testing release builds against local server

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: ndbroadbent

Taskfile.yml

@@ -8,15 +8,25 @@ tasks:
 
   # === Development ===
   dev:
-    desc: Start Tauri development mode
+    desc: Start Tauri dev mode (points to localhost:5173)
+    cmds:
+      - cargo tauri dev --features dev-server
+
+  dev:prod:
+    desc: Start Tauri dev mode (points to production API)
     cmds:
       - cargo tauri dev
 
   build:
-    desc: Build for production
+    desc: Build for production (points to chattomap.com)
     cmds:
       - cargo tauri build
 
+  build:dev:
+    desc: Build release with dev server (for testing)
+    cmds:
+      - cargo tauri build --features dev-server
+
   # === Quality Checks (run before marking any task complete) ===
   ci:
     desc: Run all CI checks

src-tauri/Cargo.toml

@@ -49,6 +49,8 @@ path = "src/cli.rs"
 [features]
 default = ["desktop"]
 desktop = ["tauri", "tauri-plugin-shell", "tauri/custom-protocol"]
+# Use local dev server instead of production
+dev-server = []
 
 [profile.release]
 panic = "abort"

src-tauri/src/upload.rs

@@ -47,12 +47,12 @@ pub type UploadProgressCallback = Box<dyn Fn(u8, String) + Send + Sync>;
 // Configuration
 // =============================================================================
 
-/// Server base URL
-#[cfg(debug_assertions)]
-const SERVER_BASE_URL: &str = "http://localhost:5173";
+/// Server base URL - use `--features dev-server` to point to localhost
+#[cfg(feature = "dev-server")]
+pub const SERVER_BASE_URL: &str = "http://localhost:5173";
 
-#[cfg(not(debug_assertions))]
-const SERVER_BASE_URL: &str = "https://chattomap.com";
+#[cfg(not(feature = "dev-server"))]
+pub const SERVER_BASE_URL: &str = "https://chattomap.com";
 
 // =============================================================================
 // Upload Implementation