Swimchain Desktop v0.1.12-alpha (mainnet — unlock/connect fix)

Fixes the launcher failing to connect after an upgrade ("Cookie file not found"): unlock retries no longer delete the running node's RPC cookie, first starts get up to 2 minutes for post-upgrade reindexing (was 10s), and a crashed node sidecar is respawned instead of wedging the app. From PR #105. Carries everything in v0.1.11-alpha (full-bleed feed media carousel, #102).

SHA-256 (setup.exe): 61cdacb8ace833922e5e8f2f336bd994a0288f504e3ddc27ee3d8c06ad3fb693