fix(bridge): v16 terminal output filter + v15 stale LS auto-fix + heartbeat probe (v0.5.50) #task-619

- http-bridge v16: Block terminal OUTPUT as enriched cmd — if description has no prompt marker (> » $ #), it's stdout from code block, not an actual command. Prevents 'No extension.log found' etc. from reaching Discord.
- step-probe v15: Stale LS auto-detection — if all sessions are >5min old, periodically retry fixLSConnection(). Heartbeat probe every 10 polls to detect step changes when summary API returns frozen stepCount.
- extension.ts v15: fixLSConnection() fallback — match LS processes without --workspace_id (common after AG restart)

extension/out/extension.js

@@ -243,8 +243,8 @@ async function fixLSConnection() {
         logToFile(`[LS-FIX] found ${lines.length} LS process(es), hint="${hint}"`);
         // Find the line whose workspace_id matches our workspace (case-insensitive)
         let matchedLine = null;
+        let fallbackLine = null; // v15: LS without workspace_id (AG restart)
         for (const line of lines) {
-            const lower = line.toLowerCase();
             // Match workspace_id arg against our hint
             const wsMatch = line.match(/--workspace_id[= ](\S+)/i);
             if (wsMatch) {
@@ -254,10 +254,25 @@ async function fixLSConnection() {
                     break;
                 }
             }
+            else {
+                // v15: LS without --workspace_id (new AG main LS after restart)
+                // Skip --enable_lsp processes (secondary/old LSP instances)
+                if (!line.includes('--enable_lsp') && !fallbackLine) {
+                    fallbackLine = line;
+                    logToFile(`[LS-FIX] found fallback LS (no workspace_id): PID=${line.split('|')[0]?.trim()}`);
+                }
+            }
         }
         if (!matchedLine) {
-            logToFile(`[LS-FIX] No LS process matched hint="${hint}" (${lines.length} processes)`);
-            return false;
+            if (fallbackLine) {
+                // v15: Use workspace_id-less LS as fallback (common after AG restart)
+                logToFile(`[LS-FIX] No workspace_id match — using fallback LS`);
+                matchedLine = fallbackLine;
+            }
+            else {
+                logToFile(`[LS-FIX] No LS process matched hint="${hint}" (${lines.length} processes)`);
+                return false;
+            }
         }
         // Extract port and csrf_token from matched line
         const csrfMatch = matchedLine.match(/--csrf_token[= ](\S+)/);