Add portal UX and dashboard specifications

Portal (unauthenticated):
- Code entry with browser-specific download instructions
- Custom protocol handler (guruconnect://session/{code})
- One-time agent runs in userspace, no admin required

Dashboard (authenticated):
- Support tab: Active sessions by technician, support request queue
- Access tab: Three-panel layout with groupings sidebar
- Build tab: Installer builder form
- Settings tab: Appearance, groupings, notifications, account

Visual style matches GuruRMM dashboard design

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.cargo/config.toml

@@ -1,6 +1,6 @@
-# GuruConnect Cargo Configuration
+# GuruConnect Cargo Configuration (Windows Development)
 
-# Default to 64-bit Windows MSVC
+# Default to 64-bit Windows MSVC for local dev
 [build]
 target = "x86_64-pc-windows-msvc"
 
@@ -10,10 +10,8 @@ target = "x86_64-pc-windows-msvc"
 b64 = "build --release --target x86_64-pc-windows-msvc"
 # Build 32-bit release
 b32 = "build --release --target i686-pc-windows-msvc"
-# Build both architectures
-ball = ["b64", "b32"]
 
-# Target-specific settings
+# Target-specific settings - static CRT for standalone binaries
 [target.x86_64-pc-windows-msvc]
 rustflags = ["-C", "target-feature=+crt-static"]