fix: rock-solid idle detection in respawn controller

- Add 300-char rolling window to catch working patterns split across PTY chunks
- Check completion message BEFORE working patterns (priority fix)
- Clear rolling window on completion message (transition point)
- Increase working pattern absence threshold from 3s to 8s
- Add Session.isWorking safety check before confirming idle
- Add 20+ more working patterns (Compiling, Building, Processing, etc.)
- Make AI idle checker prompt more conservative (err toward WORKING)
- Update documentation

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/types.ts

@@ -974,6 +974,34 @@ export function createInitialRunSummaryStats(): RunSummaryStats {
   };
 }
 
+// ========== Active Bash Tool Types ==========
+
+/**
+ * Status of an active Bash tool command.
+ */
+export type ActiveBashToolStatus = 'running' | 'completed';
+
+/**
+ * Represents an active Bash tool command detected in Claude's output.
+ * Used to display clickable file paths for file-viewing commands.
+ */
+export interface ActiveBashTool {
+  /** Unique identifier for this tool invocation */
+  id: string;
+  /** The full command being executed */
+  command: string;
+  /** Extracted file paths from the command (clickable) */
+  filePaths: string[];
+  /** Timeout string if specified (e.g., "16m 0s") */
+  timeout?: string;
+  /** Timestamp when the tool started */
+  startedAt: number;
+  /** Current status */
+  status: ActiveBashToolStatus;
+  /** Session ID this tool belongs to */
+  sessionId: string;
+}
+
 // ========== Spawn1337 Protocol Re-exports ==========
 
 export type {