docs(spec): Add Connection Mode dropdown to ServerCard wireframes

Update UX spec to show inline Connection Mode dropdown on ServerCard
for quick switching between Direct and Via Proxy modes.

Based on Cliff's feedback about making connection type more accessible
rather than buried in Settings modal.

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

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: olaservo

specification/v2_ux.md

@@ -95,19 +95,25 @@ Each server in the list is displayed as a card with connection controls and stat
 ```
 ┌─────────────────────────────────────────────────────────────────┐
 │ [Icon] Server Name                        v1.0.0                │
-│        STDIO                              [●] Connected [Toggle]│
+│        STDIO  [Via Proxy ▼]               [●] Connected [Toggle]│
 ├─────────────────────────────────────────────────────────────────┤
 │ npx -y @modelcontextprotocol/server-everything            [Copy]│
 ├─────────────────────────────────────────────────────────────────┤
 │ [Server Info] [Settings] [Clone]                 [Edit] [Remove]│
 └─────────────────────────────────────────────────────────────────┘
 ```
 
+**Connection Mode Dropdown:**
+- Quick access to switch between Direct and Via Proxy modes without opening Settings
+- STDIO servers default to "Via Proxy" (required - cannot connect directly from browser)
+- HTTP/SSE servers default to "Direct" (assumes CORS enabled)
+- Shows warning text if STDIO + Direct selected: "(STDIO requires proxy)"
+
 **With OAuth (shows OAuth Debug button):**
 ```
 ┌─────────────────────────────────────────────────────────────────┐
 │ [Icon] Server Name                        v1.0.0                │
-│        HTTP (OAuth)                       [●] Connected [Toggle]│
+│        HTTP  [Direct ▼]                   [●] Connected [Toggle]│
 ├─────────────────────────────────────────────────────────────────┤
 │ https://api.example.com/mcp                               [Copy]│
 ├─────────────────────────────────────────────────────────────────┤
@@ -119,7 +125,7 @@ Each server in the list is displayed as a card with connection controls and stat
 ```
 ┌─────────────────────────────────────────────────────────────────┐
 │ [Icon] Server Name                        v1.0.0                │
-│        HTTP                               [●] Failed (3)[Toggle]│
+│        HTTP  [Direct ▼]                   [●] Failed (3)[Toggle]│
 ├─────────────────────────────────────────────────────────────────┤
 │ https://api.example.com/mcp                               [Copy]│
 ├─────────────────────────────────────────────────────────────────┤