diff --git a/CONTEXT.md b/CONTEXT.md
index d745bbf..c57442f 100644
--- a/CONTEXT.md
+++ b/CONTEXT.md
@@ -7,7 +7,7 @@
 >
 > Ask Claude Code: "Please update CONTEXT.md with what we did today"
 
-Last updated: 2026-02-16 (session 15)
+Last updated: 2026-02-16 (session 16)
 
 ---
 
@@ -22,7 +22,7 @@ Last updated: 2026-02-16 (session 15)
 ## Current project state
 
 ### felhom-controller (this repo)
-- **Version:** v0.5.0
+- **Version:** v0.5.1
 - **Phase 1:** ✅ COMPLETE — Stack Manager + Deploy Flow
 - **Phase 2:** ✅ COMPLETE — Monitoring & Health (scheduler, CPU/temp, healthchecks.io pings)
 - **Phase 3:** ✅ COMPLETE — Backups (DB dumps, restic integration, manual trigger, **dedicated backup page**)
@@ -31,7 +31,14 @@ Last updated: 2026-02-16 (session 15)
 - **Running on:** demo-felhom (N100 mini PC) at 192.168.0.162:8080
 - **All Phase 1-4 features working:** deploy, start/stop/restart/update, logs, health-aware states, auth, monitoring, backups, backup detail page, system monitoring page
 
-### What was just completed (2026-02-16 session 15)
+### What was just completed (2026-02-16 session 16)
+- **v0.5.1 — Monitoring Page Bugfixes:**
+  - **Bug 1: Hostname** — `os.Hostname()` returns the container ID inside Docker. Fixed by mounting `/etc/hostname:/host/etc/hostname:ro` and reading it first in `sysinfo.go`. Now shows `demo-felhom`.
+  - **Bug 2: Tooltip timestamps** — Chart.js tooltip callback used `items[0].parsed.x` (category index 0,1,2...) instead of `items[0].label` (actual timestamp). Index 0 worked by accident (`0 || label` falls through), but all other points showed 1970-01-01.
+  - **Bug 3+4: Default range + empty charts** — Default range was `24h` but new system had only minutes of data. Changed to `1h` default for both system and container detail charts. Moved `active` class to "1 óra" button.
+  - **Controller version:** v0.5.1 — deployed and verified on demo-felhom.eu
+
+### What was previously completed (2026-02-16 session 15)
 - **v0.5.0 — Backup Bugfixes + Monitoring Page with Metrics Store:**
   - **Task 1: Fixed "Helyi mentés" showing "–" after restart** — `GetFullStatus()` now synthesizes `LastBackup` from `SnapshotHistory` and `LastDBDump` from `DumpFiles` on disk when the in-memory values are nil (e.g., after controller restart). Dashboard handler also updated to use `GetFullStatus()` instead of `GetStatus()` for consistent behavior.
   - **Task 2: Verified backup page caching** — Already implemented in v0.4.7 (`RefreshCache`, scheduler job, `AfterBackup` callback). No changes needed.