remove the projects feature

Being retired, so it is deleted rather than fixed — it had both defects dashboards just
had (edit dropping ?selected=, an abandoned edit following you onto the next item) and
repairing them was work for something on its way out.

Gone: the two screens and the panel apps, the three routes, the dock item and its entry
in the default dock paths (client and the three server-side copies), the page-title rule,
the app-registry entries, the barrel exports, the `projects` table with its queries and
row types, and the proj-meta/proj-layout/proj-terminals/proj-host-terminals branches in
the dashboards endpoint. The chat context and terminal state-key special cases for
`proj-layout-` went with them.

Deliberately kept: `getUserProjectsDir` in data-path.ts — the apps and dev-server routers
resolve user apps under the same on-disk Projects/ directory and are unrelated to this
feature. Nothing on disk is touched.

Needs `bun db:push` to drop the table; the schema change is the only thing standing
between the code and the database. One row was in it.

tsgo clean, 56/56 tests, no references left in src. Not yet exercised at runtime — the
restart is what will prove it.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/servers/api/integrations/integrations.ts

@@ -308,7 +308,7 @@ export const googleCallbackHandler = async (ctx: any) => {
   // Auto-add /email to dock
   try {
     const existing = await getDockPaths(dbUser.id);
-    const paths = existing ?? ['/', '/files', '/automation', '/projects', '/dashboards', '/chat'];
+    const paths = existing ?? ['/', '/files', '/automation', '/dashboards', '/chat'];
 
     if (!paths.includes('/email')) {
       paths.push('/email');