add supporters section to homepage

Shows paying squadrons as pill links (SHORT // LONG → /squadrons/<short>) above the footer, with a 15-min server-side cache backed by entitlements DB + SQUADRONS.json.

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

web/server.js

@@ -98,6 +98,7 @@ fs.mkdirSync(REPLAYS_ROOT, { recursive: true });
 const LEGACY_REPLAYS_ROOT = path.join(__dirname, '..', 'replays');
 const ENTITLEMENTS_DB_PATH = path.join(STORAGE_ROOT, 'entitlements.db');
 const SQUADRONS_DB_PATH = path.join(STORAGE_ROOT, 'squadrons.db');
+const SQUADRONS_JSON_PATH = path.join(STORAGE_ROOT, 'SQUADRONS.json');
 const entitlementsDb = new sqlite3.Database(ENTITLEMENTS_DB_PATH);
 const squadronsDb = fs.existsSync(SQUADRONS_DB_PATH)
     ? new sqlite3.Database(SQUADRONS_DB_PATH, sqlite3.OPEN_READONLY)
@@ -824,12 +825,56 @@ app.use((req, res, next) => {
     next();
 });
 
+// ── Supporters (paying squadrons) ────────────────────────────────────────────
+let _supportersCache = null;
+let _supportersCacheAt = 0;
+const SUPPORTERS_TTL = 15 * 60 * 1000;
+
+function getSupporters() {
+    if (_supportersCache && Date.now() - _supportersCacheAt < SUPPORTERS_TTL) {
+        return Promise.resolve(_supportersCache);
+    }
+    return new Promise((resolve) => {
+        let squads;
+        try {
+            squads = JSON.parse(fs.readFileSync(SQUADRONS_JSON_PATH, 'utf8'));
+        } catch {
+            return resolve([]);
+        }
+
+        entitlementsDb.all(
+            `SELECT guild_id FROM guild_entitlements WHERE status='active'
+             UNION SELECT guild_id FROM discord_entitlements
+             UNION SELECT guild_id FROM manual_entitlements WHERE expires_at > strftime('%s','now')`,
+            [],
+            (err, rows) => {
+                if (err) return resolve([]);
+                const paying = new Set(rows.map(r => r.guild_id));
+                const seen = new Map();
+                for (const [gid, sq] of Object.entries(squads)) {
+                    if (paying.has(gid) && !seen.has(sq.SQ_ShortHand_Name)) {
+                        seen.set(sq.SQ_ShortHand_Name, sq.SQ_LongHandName);
+                    }
+                }
+                const result = [...seen.entries()]
+                    .map(([short, long]) => ({ short, long }))
+                    .sort((a, b) => a.long.localeCompare(b.long));
+                _supportersCache = result;
+                _supportersCacheAt = Date.now();
+                resolve(result);
+            }
+        );
+    });
+}
+
 // Routes
-app.get('/', (req, res) => {
+app.get('/', async (req, res) => {
     const siteUrl = (process.env.PRODUCTION_DOMAIN || 'https://sre.pawjob.us').replace(/\/$/, '');
+    const supporters = await getSupporters().catch(() => []);
 
     res.render('index', {
         botName: 'Toothless SQB Bot',
+        supporters,
         metaTitle: "Toothless' SRE Bot",
         metaDescription: 'The Best Squadron Battles Bot.',
         metaUrl: `${siteUrl}/`,