docs: FEAT-06/07/08/09 — trip ID column, hotspot auto-connect, predictable IP, mDNS

FEATURES.md

@@ -153,6 +153,27 @@ dedicated PLAN.md phase (or fold it into the relevant existing work) and mark it
     previously-active codes as cleared. Is that desired? Probably not — should skip upload when
     OBD is disconnected/unavailable (the Pi already knows this from `connection` state).
 
+### FEAT-08 — Predictable IP on phone hotspot (DHCP reservation / static IP)
+- **Status**: `IDEA`
+- **Area**: `deploy/yaris_uplink.py`, phone-hotspot NM profile
+- **Phase**: Phase 27
+- **Requested**: 2026-08-11 — owner wants the Pi to always get the same IP when connected
+  to the phone hotspot, to avoid needing to check Settings for the "Last phone IP".
+- **Idea**: `dhcp-client-id=yaris-obd` is already set for consistent leases. Could add a
+  fallback static IP (`192.168.43.100` for Android, `172.20.10.100` for iPhone). Challenge:
+  different phones use different subnets. Settings already shows last IP — could make it
+  more prominent or add a "Copy" button.
+
+### FEAT-09 — mDNS (yaris.local) on phone hotspot
+- **Status**: `IDEA`
+- **Area**: Avahi, phone-hotspot NM profile
+- **Phase**: Phase 27
+- **Requested**: 2026-08-11 — owner wants `yaris.local` to resolve on phone hotspot.
+- **Idea**: Phone hotspot hosts (Android, iOS) typically don't relay multicast DNS. Avahi
+  already publishes on wlan0 AP and home WiFi. Possible workaround: lightweight DNS proxy
+  on Pi responding to `yaris.local` queries, or use Settings "Last phone IP" link. Phase 22
+  testing confirmed Pixel doesn't relay mDNS.
+
 ---
 
 ## Ideas that landed
@@ -167,3 +188,10 @@ shipped phase/date.)
   appearing in range, and falls back to home-wifi when it disappears. The wlan0 AP
   stays up regardless. Test flow: Settings → save hotspot name + password → "Wait for
   hotspot" → enable phone hotspot → verify mode changes to "Phone hotspot".
+
+### FEAT-06 — Trip ID column in history table
+- **Status**: `SHIPPED` 2026-08-11
+- **Area**: `static/js/history.js`, `templates/history.html`, `server/templates/history.html`
+- **Phase**: Phase 26
+- **What**: Narrow `#ID` column on server history (hidden on Pi via `data-show-id`).
+  Checkbox column and batch-delete restored on server only.