Add workspaces, conversation sessions, app-managed computers and pictures

- Rail: Add icon with stacked form modals (bot, workspace, computer),
  coordinator, recent bots with "See all bots", Workspaces section, and
  a workspace mode listing only its crew
- Workspaces: page for context, bots (per-workspace instructions and
  memory), computers (default, link, unlink), models and delete;
  conversations scoped per bot per workspace
- Sessions: conversations split into searchable, reopenable sessions
  with carry-over summaries; sessions and new-session header icons
- Computers: created and provisioned over the docker socket, home dir
  kept at DATA_DIR/computers/<id> after delete; super admins only
- Models: workspace settings win over a bot's own, then the defaults
- Pictures for bots and workspaces; bots editable from the header
- Coordinator tools: update_workspace, set_bot_workspace_instructions

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/harness/media/read-image.ts

@@ -18,16 +18,21 @@ type Params = {
      * Uses this bot's media reading model when it has its own.
      */
     bot_id?: number | string;
+    /**
+     * The workspace the call is in: its models win over the bot's.
+     */
+    workspace_id?: number | string | null;
 };
 
 /**
  * Reads an image with the media reading (vision) harness and returns what
  * it sees, as text for a model that can't see.
  */
-export default async function readImage({ url, focus, signal, bot_id }: Params) {
+export default async function readImage({ url, focus, signal, bot_id, workspace_id }: Params) {
     const candidates = await resolveHarnessCandidates({
         harness: "vision",
         bot_id,
+        workspace_id,
     });
 
     const { result } = await withCandidates({