feat: implement config profile git mounts

- Add git_mounts column to config_profiles table (JSONB)
- Create GitMount Pydantic models with validation
- Add repo validation in create/update endpoints
- Update profile resolver to merge git mounts from includes
- Implement auto-clone, branch checkout, and glob expansion
- Add parallel processing for git mount resolution
- Create GitMountEditor frontend component
- Update TypeScript types and API clients
- Add CSS styles for git mount UI
- Frontend type check and build pass

Implements tasks 1.1-7.9 of config-profile-git-mounts spec

apps/web/src/styles.css

@@ -4006,3 +4006,128 @@ a.nav-item,
   to { transform: translateY(0); }
 }
 
+/* Git Mount Editor Styles */
+.git-mount-editor {
+  margin-top: 1rem;
+}
+
+.git-mount-editor .section-subtitle {
+  margin: 0 0 0.75rem 0;
+  font-size: 1rem;
+  font-weight: 600;
+}
+
+.git-mount-list {
+  display: flex;
+  flex-direction: column;
+  gap: 0.5rem;
+  margin-bottom: 1rem;
+}
+
+.git-mount-item {
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: 0.5rem;
+  padding: 0.75rem;
+}
+
+.git-mount-display {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  gap: 0.5rem;
+}
+
+.git-mount-info {
+  display: flex;
+  flex-direction: column;
+  gap: 0.25rem;
+}
+
+.git-mount-repo {
+  font-weight: 600;
+  color: var(--text);
+}
+
+.git-mount-paths {
+  font-size: 0.875rem;
+  color: var(--text-muted);
+  font-family: monospace;
+}
+
+.git-mount-branch {
+  font-size: 0.75rem;
+  color: var(--accent);
+  background: var(--accent-bg);
+  padding: 0.125rem 0.375rem;
+  border-radius: 0.25rem;
+  width: fit-content;
+}
+
+.git-mount-actions {
+  display: flex;
+  gap: 0.25rem;
+}
+
+.git-mount-add {
+  border-top: 1px solid var(--border);
+  padding-top: 1rem;
+  margin-top: 1rem;
+}
+
+.git-mount-add h5 {
+  margin: 0 0 0.75rem 0;
+  font-size: 0.875rem;
+  font-weight: 600;
+  color: var(--text-muted);
+}
+
+.git-mount-form {
+  display: flex;
+  flex-direction: column;
+  gap: 0.75rem;
+}
+
+.git-mount-form .form-row {
+  display: flex;
+  flex-direction: column;
+  gap: 0.25rem;
+}
+
+.git-mount-form .form-row label {
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: var(--text);
+}
+
+.git-mount-form .form-row input,
+.git-mount-form .form-row select {
+  padding: 0.5rem;
+  border: 1px solid var(--border);
+  border-radius: 0.375rem;
+  background: var(--bg);
+  color: var(--text);
+  font-size: 0.875rem;
+}
+
+.git-mount-form .form-row input.error,
+.git-mount-form .form-row select.error {
+  border-color: #cd3131;
+}
+
+.git-mount-form .form-row .hint {
+  font-size: 0.75rem;
+  color: var(--text-muted);
+}
+
+.git-mount-form .form-row .error-text {
+  font-size: 0.75rem;
+  color: #cd3131;
+}
+
+.git-mount-form .form-actions {
+  display: flex;
+  gap: 0.5rem;
+  margin-top: 0.5rem;
+}
+