Add progress tracking fields to shared types and session parser

Introduce ProgressSubtype union ("hook" | "bash" | "mcp" | "agent") and
three new fields on ParsedMessage: toolUseId, parentToolUseId, and
progressSubtype. These enable linking hook_progress events to the
tool_call that spawned them and classifying progress by source.

Session parser changes:
- Extract `id` from tool_use content blocks into toolUseId
- Extract `tool_use_id` from tool_result blocks into toolUseId (was
  previously misassigned to toolName)
- Read `parentToolUseID` from raw progress lines
- Derive progressSubtype from the `data.type` field using a new
  deriveProgressSubtype() helper
- Add `toolProgress` map to SessionDetailResponse for grouped progress

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

src/server/services/session-parser.ts

@@ -1,5 +1,5 @@
 import fs from "fs/promises";
-import type { ParsedMessage } from "../../shared/types.js";
+import type { ParsedMessage, ProgressSubtype } from "../../shared/types.js";
 
 /**
  * Real Claude Code JSONL format (verified from actual session files):
@@ -19,6 +19,7 @@ import type { ParsedMessage } from "../../shared/types.js";
 
 interface ContentBlock {
   type: string;
+  id?: string;
   text?: string;
   thinking?: string;
   name?: string;
@@ -31,6 +32,7 @@ interface RawLine {
   type?: string;
   uuid?: string;
   timestamp?: string;
+  parentToolUseID?: string;
   message?: {
     role?: string;
     content?: string | ContentBlock[];
@@ -85,12 +87,16 @@ function extractMessages(raw: RawLine, rawIndex: number): ParsedMessage[] {
     const progressText = data
       ? formatProgressData(data)
       : "Progress event";
+    const dataType = typeof data?.type === "string" ? data.type : "";
+    const progressSubtype = deriveProgressSubtype(dataType);
     messages.push({
       uuid,
       category: "hook_progress",
       content: progressText,
       timestamp,
       rawIndex,
+      parentToolUseId: raw.parentToolUseID,
+      progressSubtype,
     });
     return messages;
   }
@@ -155,7 +161,7 @@ function extractMessages(raw: RawLine, rawIndex: number): ParsedMessage[] {
             uuid: `${uuid}-tr-${block.tool_use_id || rawIndex}`,
             category: "tool_result",
             content: resultText,
-            toolName: block.tool_use_id,
+            toolUseId: block.tool_use_id,
             timestamp,
             rawIndex,
           });
@@ -215,6 +221,7 @@ function extractMessages(raw: RawLine, rawIndex: number): ParsedMessage[] {
             toolInput: JSON.stringify(block.input, null, 2),
             timestamp,
             rawIndex,
+            toolUseId: block.id,
           });
         }
       }
@@ -239,3 +246,10 @@ function formatProgressData(data: Record<string, unknown>): string {
 function detectSystemReminder(text: string): boolean {
   return text.includes("<system-reminder>") || text.includes("</system-reminder>");
 }
+
+function deriveProgressSubtype(dataType: string): ProgressSubtype {
+  if (dataType === "bash_progress") return "bash";
+  if (dataType === "mcp_progress") return "mcp";
+  if (dataType === "agent_progress") return "agent";
+  return "hook";
+}