feat: Implement association tree for LSP-based code relationship discovery

- Add `association_tree` module with components for building and processing call association trees using LSP call hierarchy capabilities.
- Introduce `AssociationTreeBuilder` for constructing call trees from seed locations with depth-first expansion.
- Create data structures: `TreeNode`, `CallTree`, and `UniqueNode` for representing nodes and relationships in the call tree.
- Implement `ResultDeduplicator` to extract unique nodes from call trees and assign relevance scores based on depth, frequency, and kind.
- Add unit tests for `AssociationTreeBuilder` and `ResultDeduplicator` to ensure functionality and correctness.

ccw/src/core/routes/cli-routes.ts

@@ -72,6 +72,44 @@ export function getActiveExecutions(): ActiveExecution[] {
   return Array.from(activeExecutions.values());
 }
 
+/**
+ * Update active execution state from hook events
+ * Called by hooks-routes when CLI events are received from terminal execution
+ */
+export function updateActiveExecution(event: {
+  type: 'started' | 'output' | 'completed';
+  executionId: string;
+  tool?: string;
+  mode?: string;
+  prompt?: string;
+  output?: string;
+  success?: boolean;
+}): void {
+  const { type, executionId, tool, mode, prompt, output, success } = event;
+
+  if (type === 'started') {
+    // Create new active execution
+    activeExecutions.set(executionId, {
+      id: executionId,
+      tool: tool || 'unknown',
+      mode: mode || 'analysis',
+      prompt: (prompt || '').substring(0, 500),
+      startTime: Date.now(),
+      output: '',
+      status: 'running'
+    });
+  } else if (type === 'output') {
+    // Append output to existing execution
+    const activeExec = activeExecutions.get(executionId);
+    if (activeExec && output) {
+      activeExec.output += output;
+    }
+  } else if (type === 'completed') {
+    // Remove from active executions
+    activeExecutions.delete(executionId);
+  }
+}
+
 /**
  * Handle CLI routes
  * @returns true if route was handled, false otherwise

ccw/src/core/routes/hooks-routes.ts

@@ -266,6 +266,37 @@ export async function handleHooksRoutes(ctx: HooksRouteContext): Promise<boolean
         }
       }
 
+      // Update active executions state for CLI streaming events (terminal execution)
+      if (type === 'CLI_EXECUTION_STARTED' || type === 'CLI_OUTPUT' || type === 'CLI_EXECUTION_COMPLETED') {
+        try {
+          const { updateActiveExecution } = await import('./cli-routes.js');
+
+          if (type === 'CLI_EXECUTION_STARTED') {
+            updateActiveExecution({
+              type: 'started',
+              executionId: String(extraData.executionId || ''),
+              tool: String(extraData.tool || 'unknown'),
+              mode: String(extraData.mode || 'analysis'),
+              prompt: String(extraData.prompt_preview || '')
+            });
+          } else if (type === 'CLI_OUTPUT') {
+            updateActiveExecution({
+              type: 'output',
+              executionId: String(extraData.executionId || ''),
+              output: String(extraData.data || '')
+            });
+          } else if (type === 'CLI_EXECUTION_COMPLETED') {
+            updateActiveExecution({
+              type: 'completed',
+              executionId: String(extraData.executionId || ''),
+              success: Boolean(extraData.success)
+            });
+          }
+        } catch (err) {
+          console.error('[Hooks] Failed to update active execution:', err);
+        }
+      }
+
       // Broadcast to all connected WebSocket clients
       const notification = {
         type: typeof type === 'string' && type.trim().length > 0 ? type : 'session_updated',

ccw/src/core/routes/issue-routes.ts

@@ -170,7 +170,13 @@ function getIssueDetail(issuesDir: string, issueId: string) {
   const issues = readIssuesJsonl(issuesDir);
   let issue = issues.find(i => i.id === issueId);
 
-  // Fallback: Reconstruct issue from solution file if issue not in issues.jsonl
+  // Fix: Check history if not found in active issues
+  if (!issue) {
+    const historyIssues = readIssueHistoryJsonl(issuesDir);
+    issue = historyIssues.find(i => i.id === issueId);
+  }
+
+  // Fallback: Reconstruct issue from solution file if issue not in issues.jsonl or history
   if (!issue) {
     const solutionPath = join(issuesDir, 'solutions', `${issueId}.jsonl`);
     if (existsSync(solutionPath)) {
@@ -948,7 +954,8 @@ export async function handleIssueRoutes(ctx: RouteContext): Promise<boolean> {
 
   // GET /api/issues/history - List completed issues from history
   if (pathname === '/api/issues/history' && req.method === 'GET') {
-    const history = readIssueHistoryJsonl(issuesDir);
+    // Fix: Use enrichIssues to add solution/task counts to historical issues
+    const history = enrichIssues(readIssueHistoryJsonl(issuesDir), issuesDir);
     res.writeHead(200, { 'Content-Type': 'application/json' });
     res.end(JSON.stringify({
       issues: history,