fix(deploy): stop tracking public/team + public/branding

These upload directories are owned by root on the VPS (the container
entrypoint chowns mounted volumes to 1001:1001), so `git reset --hard`
failed trying to create public/team/.gitkeep as the deploy user.

Treat them like the other upload dirs (applications, cases, news, parts,
operations-inbox, footage) — gitignored, created by the Docker volume
mount at runtime. Removes public/team/.gitkeep from tracking and adds
public/team/ + public/branding/ to .gitignore.

This unblocks clean `git reset --hard origin/main` on the VPS.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitignore

@@ -50,6 +50,8 @@ public/news/
 public/parts/
 public/operations-inbox/
 public/footage/
+public/team/
+public/branding/
 
 # Local Claude Code / MCP config — agent-specific, not project
 .mcp.json