chore: remove old handoff docs, plans, review reports, and task lists from rootHEADmaindev

Removed 40+ markdown files that were cluttering the repo root:
- frontend-*-handoff.md (28 files) — historical API contract handoffs, features all implemented
- backend-to-fe-handoff.md, backend-to-fe-handoff-2.md — old handoff docs
- broken-chat-repair-handoff.md — old repair handoff
- PLAN-mcp.md, PLAN-per-edit-diagnostics.md — old planning docs
- ai-review-report.md, crash-review-report.md — one-time review reports
- tasks.md, HANDOFF.md — outdated status docs (git log is the source of truth)

Kept: AGENTS.md, GLOSSARY.md, ORCHESTRATOR.md, README.md
Also: gitignored ai-review-report.md so future Gemini reviews don't commit it

1 files changed, 0 insertions, 102 deletions

diff --git a/frontend-conversation-lifecycle-handoff.md b/frontend-conversation-lifecycle-handoff.md
deleted file mode 100644
index ca6de57..0000000
--- a/frontend-conversation-lifecycle-handoff.md
+++ /dev/null
@@ -1,102 +0,0 @@
-# FE handoff — conversation lifecycle (tab persistence across devices)
-
-Courier this to `../frontend`. All changes are ADDITIVE — nothing existing breaks.
-
-## What shipped (backend)
-
-Conversations now have a lifecycle **status** field: `active`, `idle`, or `closed`.
-This enables tab persistence: when a new browser connects, it fetches all
-`active` + `idle` conversations and restores the tab bar.
-
-- **`active`** — an agent is currently generating (a turn is in-flight).
-- **`idle`** — conversation exists, not generating. User can send a message to resume.
-- **`closed`** — user dismissed the tab (hidden from the tab bar, not deleted).
-
-Status transitions are driven by the backend:
-- `idle → active` when a turn starts.
-- `active → idle` when a turn settles (done/error).
-- `→ closed` when `POST /conversations/:id/close` is called.
-
-## Bump pinned deps
-- `@dispatch/wire` → `0.10.0`
-- `@dispatch/transport-contract` → `0.14.0`
-
-## New types (`@dispatch/wire` + `@dispatch/transport-contract`)
-
-```ts
-export type ConversationStatus = "active" | "idle" | "closed";
-
-// ConversationMeta now has a status field:
-export interface ConversationMeta {
-  readonly id: string;
-  readonly createdAt: number;
-  readonly lastActivityAt: number;
-  readonly title: string;
-  readonly status: ConversationStatus;
-}
-
-// New WS message (server → client):
-export interface ConversationStatusChangedMessage {
-  readonly type: "conversation.statusChanged";
-  readonly conversationId: string;
-  readonly status: ConversationStatus;
-}
-```
-
-`ConversationStatusChangedMessage` is added to the `WsServerMessage` union.
-
-## `GET /conversations?status=active,idle` — filter by status
-
-The existing `GET /conversations` endpoint now accepts an optional `?status=`
-query param: a comma-separated list of statuses to filter by.
-
-- **Default (no param):** returns ALL conversations (all statuses).
-- `?status=active,idle` → only active + idle (what the FE tab bar wants).
-- `?status=closed` → only closed conversations (for a history view).
-- Invalid values are silently dropped. If all values are invalid, no filter
-  is applied (returns all).
-
-## `POST /conversations/:id/close` — marks as closed
-
-The existing close endpoint now also sets the conversation's status to `closed`
-in the store. This persists across server restarts. The response is unchanged
-(`{ conversationId, abortedTurn }`).
-
-## `conversation.statusChanged` WS message
-
-Broadcast to ALL connected WS clients whenever a conversation's status changes.
-The backend emits this synchronously alongside the existing `turnStarted` /
-`turnSettled` / `conversationClosed` hooks.
-
-```ts
-{ type: "conversation.statusChanged", conversationId: "conv-1", status: "active" }
-```
-
-## What the FE needs to do
-
-1. **On connect:** call `GET /conversations?status=active,idle` to fetch
-   conversations for the tab bar. Render tabs for each.
-
-2. **`active` tabs:** subscribe to the conversation's live stream
-   (`chat.subscribe` WS op) to receive in-flight events.
-
-3. **`idle` tabs:** load history via `GET /conversations/:id`. No live
-   subscription needed until the user sends a message.
-
-4. **Tab close button:** call `POST /conversations/:id/close` to mark the
-   conversation as `closed`. Remove it from the tab bar.
-
-5. **Handle `conversation.statusChanged` WS messages:** update the tab's
-   status indicator. When a conversation goes `idle → active`, show a
-   loading/generating indicator. When it goes `active → idle`, remove the
-   indicator. When it goes `closed`, remove the tab.
-
-6. **Closed conversations:** accessible from a history view
-   (`GET /conversations?status=closed`). Can be reopened by sending a message
-   (which transitions `closed → active`).
-
-## CLI
-
-`dispatch list` now defaults to `active,idle` (excludes closed). New flags:
-- `--status <active|idle|closed>` — filter by a single status.
-- `--all` — include closed (show all statuses).