feat(sessions): import Qoder IDE session history

[Harry19081]

Summary

Adds Qoder (Alibaba's agentic IDE) as an external-history source, reusing the existing imported-history pipeline end to end (discovery cache, sidebar/kanban aggregation, replay, recent paths, data-sources panel).

Store format (discovered empirically)

• Transcript: ~/.qoder/cache/projects/<proj>/conversation-history/<task>/<task>.jsonl — one {role, message:{content:[…]}} line per message with Anthropic-style blocks, text-only (no timestamps, no tool calls). Task dir names are truncated task-id prefixes unique only per project, so the source session id is the composite <projectDir>/<taskDir> (prefix qoderapp-).
• Metadata: aicoding.questTaskListSnapshot key in Qoder's global state.vscdb (title, timestamps, workspace path), matched by id-prefix + workspace basename; enrichment only — discovery works from the JSONL alone and degrades gracefully when the running app holds the db.

Trajectory recovery (best-effort)

Tool calls stream over ACP and are not persisted to the transcript, so the reader correlates three surviving stores at load time:

• questWindow/agent.log + exthost logs: subagent registrations (type + prompt), locally-dispatched tool invocations with args (read_file, terminal commands with cwd), and FileChangeTracking edit events (which carry the session id directly)
• attribution is content-first (args paths inside the session's workspace or project cache dir), falling back to the activity window only when unambiguous; payload-less events are never emitted
• agent-tools/ spill files (oversized tool outputs) attach as read_file outputs
• chatEditingSessions/<session>/ snapshot store provides real before/after file bodies → edit_file_by_replace cards with actual diffs, and per-session impact stats (files changed, +/- via line diff, touched files) at sync time; the store mtime is folded into the discovery fingerprint so post-sync edits re-parse (parser v2)
• canonical mappings: run_in_terminal → run_command_line, get_problems → query_lsp, edit ops → edit_file_by_replace

Logs rotate per app launch, so older sessions fall back to the text-only transcript automatically.

Also included

• Turn-collapse duration label shows <1min instead of a broken-looking 0s for imported transcripts that carry no timestamps.

Testing

• 20 new unit tests in orgtrack_core (transcript parsing, snapshot matching, composite-id discovery, log parsing/attribution with overlapping session windows, spill/output attachment, edit-store resolution, diff-based impact); full crate suite passes (264)
• Verified live against 4 real Qoder sessions on disk: titles/timestamps/workspaces from the vscdb snapshot, full trajectory replay (subagent + shell commands + reads with doc-fetch bodies + create-file diff + LSP probe), and sidebar impact (1 file, +35 −0) for the file-creating session

Note

CI may currently be red on develop itself: imported_history_stat is registered in handler_list.inc and called from stat.ts, but the Rust command function isn't committed yet (it exists in a local working tree). This PR neither touches nor depends on that command.