[grade=B] api: fix undeclared 'format' runtime bug in routes/ca.js + 10 lint errors

- routes/ca.js: declare format before pfx/pem/crt dispatch (was ReferenceError
  on every request that passed validation); add CA_CERT_FORMATS single source
  of truth + hardened format extraction (string-coerce, whitelist)
- routes/caddycode.js: fix upstream-validation regexes (control-char classes)
- routes/logs.js: SSE/validation lint fixes
- routes/openclaw.js: remove useless regex escape in ALLOWED_PATH_RE
- fleet-validation.js + http-caddy-admin-origin test: eslint-disable for
  intentional control-regex security sentinels
- ca-dc076.routes.test.js: regression test for declared format + behavioral
  coverage of format validation (now pre-PKI)

Judge: Qwen lane (qwen3.8-max) grade B, 0 blocking, verdict
/tmp/judge-batch1-verdict.json. API suite 2859/2859 green.

dashcaddy-api/__tests__/routes/ca-dc076.routes.test.js

@@ -262,6 +262,67 @@ describe('DC-076: CA cert/key disclosure hardening', () => {
     });
   });
 
+  describe('regression: `format` is declared before the dispatch block', () => {
+    // The handler referenced `format` five times in the pfx/pem/crt/key/
+    // fullchain dispatch without ever declaring it — every request that
+    // reached that far threw ReferenceError. The behavioral tests above
+    // can't reach the dispatch (PKI files absent in the test env returns
+    // 500 first), so pin the declaration at the source level instead.
+    test('routes/ca.js declares `format` before dispatch', () => {
+      const src = fs.readFileSync(
+        path.join(__dirname, '../../routes/ca.js'), 'utf8');
+      // Declaration derives from req.query.format (via rawFormat) and the
+      // canonical format list drives validation.
+      expect(src).toMatch(/const\s+rawFormat\s*=\s*req\.query\.format/);
+      expect(src).toMatch(/const\s+format\s*=\s*rawFormat\s*\|\|\s*'pfx'/);
+      expect(src).toMatch(/CA_CERT_FORMATS\s*=\s*\[.*'pfx'.*'fullchain'.*\]/s);
+      // And the declaration must come before the first dispatch use.
+      const declIdx = src.search(/const\s+format\s*=/);
+      const useIdx = src.indexOf("if (format === 'pfx')");
+      expect(declIdx).toBeGreaterThanOrEqual(0);
+      expect(useIdx).toBeGreaterThan(declIdx);
+    });
+  });
+
+  describe('/cert/:domain — format validation (DC-076_FORMAT_INVALID)', () => {
+    // These validations run before the PKI file check, so they are
+    // reachable in the test environment (unlike the dispatch itself).
+    test('rejects unknown format value', async () => {
+      const { app } = createCaApp({ scope: ['admin'] });
+      const res = await request(app)
+        .get('/ca/cert/dns1.local?format=garbage');
+      expect(res.status).toBe(400);
+      expect(res.body.code).toBe('DC-076_FORMAT_INVALID');
+    });
+
+    test('rejects empty format value', async () => {
+      const { app } = createCaApp({ scope: ['admin'] });
+      const res = await request(app)
+        .get('/ca/cert/dns1.local?format=');
+      expect(res.status).toBe(400);
+      expect(res.body.code).toBe('DC-076_FORMAT_INVALID');
+    });
+
+    test('rejects array format (?format=a&format=b)', async () => {
+      const { app } = createCaApp({ scope: ['admin'] });
+      const res = await request(app)
+        .get('/ca/cert/dns1.local?format=pem&format=crt');
+      expect(res.status).toBe(400);
+      expect(res.body.code).toBe('DC-076_FORMAT_INVALID');
+    });
+
+    test('accepts every documented format (validation passes; PKI 500 is fine)', async () => {
+      for (const fmt of ['pfx', 'pem', 'crt', 'key', 'fullchain']) {
+        const { app } = createCaApp({ scope: ['admin'] });
+        const qs = fmt === 'pfx' ? `format=pfx&password=GoodPass12` : `format=${fmt}`;
+        const res = await request(app).get(`/ca/cert/dns1.local?${qs}`);
+        // Must NOT be a format rejection — anything else (e.g. 500 CA not
+        // found in the test env) proves validation accepted the format.
+        expect(res.body.code).not.toBe('DC-076_FORMAT_INVALID');
+      }
+    });
+  });
+
   describe('/cert/:domain — domain validation', () => {
     test('rejects single-label domain (no dot)', async () => {
       const { app } = createCaApp({ scope: ['admin'] });