Consolidate hooks: merge bin/hooks and hooks into single hooks/ directory

- Removed bin/hooks/ wrapper layer
- Moved all hook logic into consolidated hooks/*-hook.ts files
- Each hook now handles its own stdin/stdout/JSON wrapping
- Removed ALL try-catch blocks from context-hook (let errors surface)
- Updated build script to reference new src/hooks/ paths
- Reduced from 12+ files to 6 hook files

This simplifies the architecture and makes debugging actually possible.

src/hooks/new-hook.ts

@@ -0,0 +1,75 @@
+#!/usr/bin/env node
+/**
+ * New Hook - UserPromptSubmit
+ * Consolidated entry point + logic
+ */
+
+import path from 'path';
+import { stdin } from 'process';
+import { SessionStore } from '../services/sqlite/SessionStore.js';
+import { createHookResponse } from './hook-response.js';
+import { ensureWorkerRunning, getWorkerPort } from '../shared/worker-utils.js';
+
+export interface UserPromptSubmitInput {
+  session_id: string;
+  cwd: string;
+  prompt: string;
+  [key: string]: any;
+}
+
+/**
+ * New Hook Main Logic
+ */
+async function newHook(input?: UserPromptSubmitInput): Promise<void> {
+  if (!input) {
+    throw new Error('newHook requires input');
+  }
+
+  const { session_id, cwd, prompt } = input;
+  const project = path.basename(cwd);
+
+  // Ensure worker is running first
+  const workerReady = await ensureWorkerRunning();
+  if (!workerReady) {
+    throw new Error('Worker service failed to start or become healthy');
+  }
+
+  const db = new SessionStore();
+
+  // Save session_id for indexing
+  const sessionDbId = db.createSDKSession(session_id, project, prompt);
+  const promptNumber = db.incrementPromptCounter(sessionDbId);
+
+  // Save raw user prompt for full-text search
+  db.saveUserPrompt(session_id, promptNumber, prompt);
+
+  console.error(`[new-hook] Session ${sessionDbId}, prompt #${promptNumber}`);
+
+  db.close();
+
+  // Get fixed port
+  const port = getWorkerPort();
+
+  // Initialize session via HTTP
+  const response = await fetch(`http://127.0.0.1:${port}/sessions/${sessionDbId}/init`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ project, userPrompt: prompt }),
+    signal: AbortSignal.timeout(5000)
+  });
+
+  if (!response.ok) {
+    const errorText = await response.text();
+    throw new Error(`Failed to initialize session: ${response.status} ${errorText}`);
+  }
+
+  console.log(createHookResponse('UserPromptSubmit', true));
+}
+
+// Entry Point
+let input = '';
+stdin.on('data', (chunk) => input += chunk);
+stdin.on('end', async () => {
+  const parsed = input ? JSON.parse(input) : undefined;
+  await newHook(parsed);
+});