feat: add .env and Claude config downloads to API key reveal

After creating a key, two download buttons appear:
- 'Download .env' — pre-filled FABLE_URL + FABLE_API_KEY
- 'Download Claude config' — ready-to-paste mcpServers JSON block

Also adds Future Task A (in-app install instructions) and Future Task B
(Forgejo MCP) to the implementation plan.

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

docs/2026-03-23-fable-mcp-plan.md

@@ -2057,3 +2057,33 @@ Ask Claude: "Use Fable to list my projects." Verify a real response comes back.
 git add fable-mcp/
 git commit -m "feat: fable-mcp v0.1.0 — complete MCP server with all tool groups"
 ```
+
+---
+
+## Future Tasks (post v0.1.0)
+
+### Future Task A: In-app MCP install instructions (PyPI/Forgejo registry)
+
+Once `fable-mcp` is published to a package registry (PyPI or the Forgejo package registry at `git.fabledsword.com`), add an install instructions panel to the API Keys tab in Settings. This replaces manual `pip install -e` with a one-liner and links the version shown to the package registry.
+
+**Files:**
+- Modify: `frontend/src/views/SettingsView.vue` — add "Install" section above the create form showing:
+  - `pip install fable-mcp` (or registry-specific command)
+  - Current published version badge (fetched from registry API)
+  - Link to full documentation/README
+
+**Depends on:** fable-mcp extracted to its own Forgejo repo and published as a package.
+
+---
+
+### Future Task B: Forgejo MCP server
+
+A second MCP server (`forgejo-mcp/`) that gives Claude direct access to the Forgejo instance at `git.fabledsword.com` for CI/CD automation. Capabilities: list/create/merge PRs, trigger CI runs, read build logs, manage releases, push config files.
+
+**Scope:** Separate spec + plan session. Key questions to resolve in brainstorming:
+- Authentication: Forgejo personal access token vs. OAuth app
+- Which Gitea/Forgejo API endpoints to expose as tools
+- Whether to use an existing `gitea-mcp` or build from scratch (check Forgejo's MCP compatibility)
+- CI automation: trigger builds, read job logs, manage runner labels
+
+**Prerequisite:** fable-mcp v0.1.0 working and registered in Claude Code.

frontend/src/views/SettingsView.vue

@@ -94,6 +94,38 @@ async function copyApiKey() {
   setTimeout(() => { apiKeyCopied.value = false; }, 2000);
 }
 
+function _downloadFile(filename: string, content: string, mimeType = 'text/plain') {
+  const blob = new Blob([content], { type: mimeType });
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement('a');
+  a.href = url;
+  a.download = filename;
+  a.click();
+  URL.revokeObjectURL(url);
+}
+
+function downloadEnvFile() {
+  const baseUrl = window.location.origin;
+  const content = `FABLE_URL=${baseUrl}\nFABLE_API_KEY=${newKeyValue.value}\n`;
+  _downloadFile('fable-mcp.env', content);
+}
+
+function downloadMcpConfig() {
+  const baseUrl = window.location.origin;
+  const config = {
+    mcpServers: {
+      fable: {
+        command: 'fable-mcp',
+        env: {
+          FABLE_URL: baseUrl,
+          FABLE_API_KEY: newKeyValue.value,
+        },
+      },
+    },
+  };
+  _downloadFile('fable-mcp-config.json', JSON.stringify(config, null, 2), 'application/json');
+}
+
 // Groups management
 const groups = ref<GroupEntry[]>([]);
 const groupsLoading = ref(false);
@@ -1537,7 +1569,11 @@ function formatUserDate(iso: string): string {
             <code class="api-key-value">{{ newKeyValue }}</code>
             <button @click="copyApiKey" class="btn btn-secondary btn-sm">{{ apiKeyCopied ? 'Copied!' : 'Copy' }}</button>
           </div>
-          <button @click="newKeyValue = ''" class="btn btn-secondary" style="margin-top: 0.5rem;">Done</button>
+          <div style="display:flex; gap:0.5rem; margin-top: 0.5rem;">
+            <button @click="downloadEnvFile" class="btn btn-secondary btn-sm">Download .env</button>
+            <button @click="downloadMcpConfig" class="btn btn-secondary btn-sm">Download Claude config</button>
+            <button @click="newKeyValue = ''" class="btn btn-secondary">Done</button>
+          </div>
         </div>
 
         <!-- Keys table -->