onu detail polish + clickable OLT detail modal

- Fix alarm card overflow: alarm rows stack (severity+text on one line that
  wraps, meta below) instead of squeezing the text to ~0 width next to the
  nowrap meta — which had made long alarm text render one char per line in
  narrow columns. Also min-width:0 on cards/kv so long IPv6/descr strings
  don't blow out the grid track.
- Combine Parent OLT + Upstream switch into one "Parent OLT & uplink" card.
- ONU list/search de-compacted: add equipment/version + PON-mode filters;
  two-line rows (serial+status, then equipment · version · last-seen).
- UNI card labels the speed as configured ("cfg Auto/Auto"); negotiated
  speed isn't in the payloads — link up/down still comes from LAN-LOS.

Clickable parent OLT -> OLT detail modal (showOltModal):
- new src/oltdetail.js (pure, shared; reuses summarizeAlarms) + getOltState
  / getOltAlarms client methods + api:getOltDetail (main + web + bridges).
- shows identity, traffic + util, ASIC temperature, ONU counts, laser,
  alarms, upstream switch; plus a connected-ONU list with per-ONU
  FEC/optical built from the loaded fleet (filtered by _status.oltMac),
  each row clickable back into that ONU's detail.

Docs: CLAUDE.md §17 + IPC table.

Verified: node --check; oltdetail.js unit-tested 9/9 (fw active-bank,
traffic down=TX/up=RX, util, ASIC temp, ONU counts, laser, LLDP, alarms);
rendered the OLT modal + richer list offscreen and confirmed the alarm-text
wrap fix (alarm head ~1-2 lines, not vertical).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

renderer/index.html

@@ -77,6 +77,17 @@
       <label>Search (name / address / serial)
         <input id="onu-info-search" type="search" placeholder="e.g. ORKANGER or GNXS05…" />
       </label>
+      <label>Equipment / version contains
+        <input id="onu-info-eq" type="search" placeholder="e.g. FT-XGS2110 or EV051" />
+      </label>
+      <label>PON mode
+        <select id="onu-info-pon">
+          <option value="">Any</option>
+          <option value="GPON">GPON</option>
+          <option value="XGS-PON">XGS-PON</option>
+          <option value="10G-EPON">10G-EPON</option>
+        </select>
+      </label>
       <label>Registration status
         <select id="onu-info-status">
           <option value="">Any</option>