fix(web): add repository creation to project settings

- Add repository creation dialog to the project settings repositories tab
- Reuse shared repository API for list/create/delete operations
- Add coverage for the create flow in the settings tab

Quality gates: tsc --noEmit, vitest run src/components/repositories-settings-tab.test.tsx

apps/web/src/components/repositories-settings-tab.tsx

@@ -1,37 +1,77 @@
-import React, { useState, useEffect } from "react";
+import React, { useCallback, useEffect, useState } from "react";
 import { useParams } from "react-router-dom";
-import { apiClient } from "../api/client";
-import { GitRepository } from "../api/git_repositories";
+
+import {
+  createRepository,
+  deleteRepository,
+  listRepositories,
+  type GitRepository,
+  type GitRepositoryCreate,
+} from "../api/git_repositories";
+import { Icon } from "./icon";
 
 export const RepositoriesSettingsTab: React.FC = () => {
   const { projectId } = useParams<{ projectId: string }>();
   const [repositories, setRepositories] = useState<GitRepository[]>([]);
   const [loading, setLoading] = useState(true);
-  const [error, setError] = useState(">");
+  const [showCreate, setShowCreate] = useState(false);
+  const [formName, setFormName] = useState("");
+  const [formRemoteUrl, setFormRemoteUrl] = useState("");
+  const [error, setError] = useState("");
 
-  useEffect(() => {
-    const fetchRepositories = async () => {
-      try {
-        const response = await apiClient.get(
-          `/projects/${projectId}/repositories`
-        );
-        setRepositories(response.data);
-      } catch (err) {
-        setError("Failed to load repositories");
-      } finally {
-        setLoading(false);
-      }
-    };
+  const loadRepositories = useCallback(async () => {
+    if (!projectId) {
+      setLoading(false);
+      return;
+    }
 
-    fetchRepositories();
+    setLoading(true);
+    try {
+      const data = await listRepositories(projectId);
+      setRepositories(data);
+    } catch {
+      setError("Failed to load repositories");
+    } finally {
+      setLoading(false);
+    }
   }, [projectId]);
 
+  useEffect(() => {
+    void loadRepositories();
+  }, [loadRepositories]);
+
+  const handleCreate = async (event: React.FormEvent) => {
+    event.preventDefault();
+    setError("");
+
+    if (!projectId) return;
+    if (!formName.trim()) {
+      setError("Repository name is required");
+      return;
+    }
+
+    try {
+      const input: GitRepositoryCreate = {
+        name: formName.trim(),
+        remote_url: formRemoteUrl.trim() || undefined,
+      };
+      await createRepository(projectId, input);
+      setShowCreate(false);
+      setFormName("");
+      setFormRemoteUrl("");
+      await loadRepositories();
+    } catch {
+      setError("Failed to create repository");
+    }
+  };
+
   const handleDelete = async (repoId: string) => {
+    if (!projectId) return;
     if (!window.confirm("Are you sure you want to delete this repository?")) return;
     try {
-      await apiClient.delete(`/projects/${projectId}/repositories/${repoId}`);
-      setRepositories(repositories.filter((r) => r.id !== repoId));
-    } catch (err) {
+      await deleteRepository(projectId, repoId);
+      setRepositories((current) => current.filter((r) => r.id !== repoId));
+    } catch {
       setError("Failed to delete repository");
     }
   };
@@ -40,7 +80,13 @@ export const RepositoriesSettingsTab: React.FC = () => {
 
   return (
     <div className="repositories-settings-tab">
-      <h2>Repositories</h2>
+      <div className="page-header">
+        <h2>Repositories</h2>
+        <button className="primary-button" onClick={() => setShowCreate(true)} type="button">
+          <Icon name="add" size="sm" />
+          Add Repository
+        </button>
+      </div>
       {error && <div className="error-message">{error}</div>}
 
       <div className="repositories-list">
@@ -66,6 +112,42 @@ export const RepositoriesSettingsTab: React.FC = () => {
           ))
         )}
       </div>
+
+      {showCreate && (
+        <div className="dialog-overlay" role="dialog" aria-modal="true">
+          <div className="dialog">
+            <h3>Add Repository</h3>
+            <form onSubmit={handleCreate} className="stack">
+              <label className="form-field">
+                Name
+                <input
+                  type="text"
+                  value={formName}
+                  onChange={(event) => setFormName(event.target.value)}
+                  placeholder="repository-name"
+                />
+              </label>
+              <label className="form-field">
+                Remote URL (optional)
+                <input
+                  type="text"
+                  value={formRemoteUrl}
+                  onChange={(event) => setFormRemoteUrl(event.target.value)}
+                  placeholder="https://github.com/user/repo.git"
+                />
+              </label>
+              <div className="dialog-actions">
+                <button className="secondary-button" onClick={() => setShowCreate(false)} type="button">
+                  Cancel
+                </button>
+                <button className="primary-button" type="submit">
+                  Create
+                </button>
+              </div>
+            </form>
+          </div>
+        </div>
+      )}
     </div>
   );
 };