feat: rename data directory, add global project settings, multi-project CLI commands, and provider badge in model selector

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

demo/seed.ts

@@ -1,5 +1,5 @@
 /**
- * Seeds a .kb board with realistic tasks across all columns.
+ * Seeds a .fusion board with realistic tasks across all columns.
  * Run from a git repo: `npx tsx demo/seed.ts [dir]`
  *
  * Creates a board that looks like an active project mid-flight:
@@ -334,7 +334,7 @@ ${stepsSection}
 - [ ] No regressions
 `;
 
-  const dir = join(store.getRootDir(), ".kb", "tasks", id);
+  const dir = join(store.getRootDir(), ".fusion", "tasks", id);
   await writeFile(join(dir, "PROMPT.md"), prompt);
 }
 

demo/simulate.ts

@@ -142,7 +142,7 @@ async function main() {
       const task = pick(inReview);
       await store.logEntry(task.id, "Auto-merged into main");
       // Can't use mergeTask (no real branch), so just move directly
-      const dir = `${root}/.kb/tasks/${task.id}`;
+      const dir = `${root}/.fusion/tasks/${task.id}`;
       // Read, update, write manually to move to done
       const detail = await store.getTask(task.id);
       await store.updateTask(task.id, { status: undefined, worktree: undefined });