docs: update tile evaluation + monitoring + add geoportal improvement mega prompt

- TILE-SERVER-EVALUATION.md: updated to reflect current architecture (PMTiles z0-z18)
- MODULE-MAP.md: added PMTiles + tile-cache to Geoportal section
- Monitor: timeout increased to 90 min for z18 builds, description updated
- Added PROMPT-GEOPORTAL-IMPROVE.md with mega prompt for future sessions
  (includes MLT check, mvt-rs evaluation prompt, operational commands)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/app/(modules)/monitor/page.tsx

@@ -80,15 +80,15 @@ export default function MonitorPage() {
           }
         } catch { /* continue polling */ }
       }, 15_000);
-      // Timeout after 30 min (z16 builds can take 15-25 min)
+      // Timeout after 90 min (z18 builds can take 45-60 min)
       setTimeout(() => {
         if (pollRef.current) {
           clearInterval(pollRef.current);
           pollRef.current = null;
-          addLog("error", "Timeout: rebuild nu s-a finalizat in 30 minute");
+          addLog("error", "Timeout: rebuild nu s-a finalizat in 90 minute");
           setActionLoading("");
         }
-      }, 30 * 60_000);
+      }, 90 * 60_000);
     } catch {
       addLog("error", "Nu s-a putut trimite webhook-ul");
       setActionLoading("");
@@ -225,7 +225,7 @@ export default function MonitorPage() {
         <div className="flex flex-wrap gap-3 mb-4">
           <ActionButton
             label="Rebuild PMTiles"
-            description="Regenereaza tile-urile overview din PostGIS (~8 min)"
+            description="Regenereaza tile-urile overview din PostGIS (~45-60 min)"
             loading={actionLoading === "rebuild"}
             onClick={triggerRebuild}
           />