feat: smart git URL parsing for browser URLs

- Add git URL parsing utilities (extract_base_repo_url, parse_git_url)
- Support GitHub, GitLab, Bitbucket browser URL detection
- Add /projects/repositories/parse-url endpoint
- Enhance repository creation to detect browser URLs and suggest corrections
- Add real-time URL validation in frontend with debouncing
- Show visual indicators (green/yellow/red) for URL validity
- Display inline suggestions with 'Use Suggested' button
- Add comprehensive unit tests for URL parsing
- Quality gates: ruff ✓, mypy ✓, typecheck ✓, lint ✓, build ✓

apps/web/src/styles.css

@@ -372,3 +372,68 @@ a {
     flex-direction: column;
   }
 }
+
+/* URL Validation Styles */
+.valid-url {
+  border-color: #16a34a !important;
+  background-color: #f0fdf4 !important;
+}
+
+.needs-parsing-url {
+  border-color: #ca8a04 !important;
+  background-color: #fefce8 !important;
+}
+
+.invalid-url {
+  border-color: #dc2626 !important;
+  background-color: #fef2f2 !important;
+}
+
+.validation-status {
+  font-size: 0.85rem;
+  margin-top: 0.25rem;
+  display: block;
+}
+
+.validation-status.valid {
+  color: #16a34a;
+}
+
+.validation-status.warning {
+  color: #ca8a04;
+}
+
+.validation-status.invalid {
+  color: #dc2626;
+}
+
+.validation-status.validating {
+  color: var(--muted);
+}
+
+.url-suggestion {
+  margin-top: 0.5rem;
+  padding: 0.5rem;
+  background: #fefce8;
+  border-radius: 8px;
+  border: 1px solid #fde047;
+}
+
+.suggestion-actions {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+  margin-top: 0.35rem;
+}
+
+.suggested-url {
+  font-size: 0.85rem;
+  color: #854d0e;
+  flex: 1;
+  word-break: break-all;
+}
+
+.secondary-button.small {
+  padding: 0.35rem 0.6rem;
+  font-size: 0.85rem;
+}