refactor: split types.ts into domain modules (phase 4, step 1)

Split 1,443-line types.ts into 14 focused domain files under src/types/:
common.ts, session.ts, task.ts, app-state.ts, respawn.ts, ralph.ts,
api.ts, lifecycle.ts, run-summary.ts, tools.ts, teams.ts, push.ts,
plan.ts, and index.ts barrel.

Moved PlanItem interface from plan-orchestrator.ts into types/plan.ts
to break circular dependency. Original types.ts replaced with barrel
re-export — zero changes to 36 import sites.

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

src/types/tools.ts

@@ -0,0 +1,48 @@
+/**
+ * @fileoverview Tool-related type definitions
+ */
+
+/**
+ * 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;
+}
+
+/**
+ * Event emitted when a new image file is detected in a session's working directory.
+ * Used to trigger automatic image popup display in the web UI.
+ */
+export interface ImageDetectedEvent {
+  /** Codeman session ID where the image was detected */
+  sessionId: string;
+  /** Full path to the detected image file */
+  filePath: string;
+  /** Path relative to the session's working directory (for file-raw endpoint) */
+  relativePath: string;
+  /** Image file name (basename) */
+  fileName: string;
+  /** Timestamp when the image was detected */
+  timestamp: number;
+  /** File size in bytes */
+  size: number;
+}