feat: expose read-only MCP tools to all agent types, fix settings base URL handling

Add feature_get_ready, feature_get_blocked, and feature_get_graph to
CODING_AGENT_TOOLS, TESTING_AGENT_TOOLS, and INITIALIZER_AGENT_TOOLS.
These read-only tools were available on the MCP server but blocked by
the allowed_tools lists, causing "blocked/not allowed" errors when
agents tried to query project state.

Fix SettingsModal custom base URL input:
- Remove fallback to current settings value when saving, so empty input
  is not silently replaced with the existing URL
- Remove .trim() on the input value to prevent cursor jumping while typing
- Fix "Change" button pre-fill using empty string instead of space

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client.py

@@ -141,7 +141,6 @@ def get_extra_read_paths() -> list[Path]:
 # overhead and preventing agents from calling tools meant for other roles.
 #
 # Tools intentionally omitted from ALL agent lists (UI/orchestrator only):
-#   feature_get_ready, feature_get_blocked, feature_get_graph,
 #   feature_remove_dependency
 #
 # The ghost tool "feature_release_testing" was removed entirely -- it was
@@ -151,6 +150,9 @@ CODING_AGENT_TOOLS = [
     "mcp__features__feature_get_stats",
     "mcp__features__feature_get_by_id",
     "mcp__features__feature_get_summary",
+    "mcp__features__feature_get_ready",
+    "mcp__features__feature_get_blocked",
+    "mcp__features__feature_get_graph",
     "mcp__features__feature_claim_and_get",
     "mcp__features__feature_mark_in_progress",
     "mcp__features__feature_mark_passing",
@@ -163,12 +165,18 @@ TESTING_AGENT_TOOLS = [
     "mcp__features__feature_get_stats",
     "mcp__features__feature_get_by_id",
     "mcp__features__feature_get_summary",
+    "mcp__features__feature_get_ready",
+    "mcp__features__feature_get_blocked",
+    "mcp__features__feature_get_graph",
     "mcp__features__feature_mark_passing",
     "mcp__features__feature_mark_failing",
 ]
 
 INITIALIZER_AGENT_TOOLS = [
     "mcp__features__feature_get_stats",
+    "mcp__features__feature_get_ready",
+    "mcp__features__feature_get_blocked",
+    "mcp__features__feature_get_graph",
     "mcp__features__feature_create_bulk",
     "mcp__features__feature_create",
     "mcp__features__feature_add_dependency",

ui/src/components/SettingsModal.tsx

@@ -83,9 +83,8 @@ export function SettingsModal({ isOpen, onClose }: SettingsModalProps) {
   }
 
   const handleSaveCustomBaseUrl = () => {
-    const effectiveBaseUrl = customBaseUrlInput || settings?.api_base_url || ''
+    if (customBaseUrlInput.trim() && !updateSettings.isPending) {
-    if (effectiveBaseUrl.trim() && !updateSettings.isPending) {
+      updateSettings.mutate({ api_base_url: customBaseUrlInput.trim() })
-      updateSettings.mutate({ api_base_url: effectiveBaseUrl.trim() })
       setCustomBaseUrlInput('')
     }
   }
@@ -299,7 +298,7 @@ export function SettingsModal({ isOpen, onClose }: SettingsModalProps) {
                         variant="ghost"
                         size="sm"
                         className="h-auto py-0.5 px-2 text-xs shrink-0"
-                        onClick={() => setCustomBaseUrlInput(settings.api_base_url || ' ')}
+                        onClick={() => setCustomBaseUrlInput(settings.api_base_url || '')}
                       >
                         Change
                       </Button>
@@ -309,7 +308,7 @@ export function SettingsModal({ isOpen, onClose }: SettingsModalProps) {
                     <div className="flex gap-2">
                       <input
                         type="text"
-                        value={customBaseUrlInput.trim()}
+                        value={customBaseUrlInput}
                         onChange={(e) => setCustomBaseUrlInput(e.target.value)}
                         placeholder={currentProvider === 'azure' ? 'https://your-resource.services.ai.azure.com/anthropic' : 'https://api.example.com/v1'}
                         className="flex-1 py-1.5 px-3 text-sm border rounded-md bg-background"