Raise the chamber-temperature ceiling from 60 to 65 C

Every field that takes a chamber target stopped at 60: the per-filament
chamber map and per-print override in Preheat & Heat Soak, the chamber
quick-select presets, and the printer-card chamber control. 60 is the
X1E's ceiling and the X1E was the only heated-chamber model when that
limit was written; the H2 series and X2D heat to 65, so the top of their
range was unreachable.

The ceiling now lives in one constant per side (MAX_CHAMBER_TEMP_C in
backend/app/utils/printer_models.py and frontend/src/utils/printer.ts)
rather than as a literal at each call site. X1E firmware clamps a higher
request to its own maximum, so a shared ceiling is safe.

Also fixes a live bug at PrintersPage.tsx:7985: parsePresetTriple was
bounded to 60 there, and it rejects the whole triple on any out-of-range
entry, so a saved 65 preset would have silently reverted the printer
card to the defaults while Settings still showed 65.

frontend/src/utils/preheatFilamentTargets.ts

@@ -3,6 +3,8 @@
 // are chamber-temperature recommendations from BambuStudio's bundled filament
 // profiles; users can override the whole map via the Settings → Workflow card.
 
+import { MAX_CHAMBER_TEMP_C } from './printer';
+
 export const DEFAULT_PREHEAT_FILAMENT_TARGETS: Record<string, number> = {
   PLA: 0,
   PETG: 0,
@@ -44,7 +46,7 @@ export function parsePreheatFilamentTargets(raw: string): Record<string, number>
       for (const [key, value] of Object.entries(parsed)) {
         const num = typeof value === 'number' ? value : Number(value);
         if (Number.isFinite(num)) {
-          out[key] = Math.max(0, Math.min(60, Math.round(num)));
+          out[key] = Math.max(0, Math.min(MAX_CHAMBER_TEMP_C, Math.round(num)));
         }
       }
       if (out.default === undefined) out.default = DEFAULT_PREHEAT_FILAMENT_TARGETS.default;

frontend/src/utils/printer.ts

@@ -18,6 +18,14 @@ export function getPrinterImage(model: string | null | undefined): string {
   return '/img/printers/default.png';
 }
 
+// Ceiling for every chamber-temperature target the UI accepts (manual set,
+// preheat filament map, per-item preheat override, chamber quick-select
+// presets). Mirrors backend MAX_CHAMBER_TEMP_C in
+// backend/app/utils/printer_models.py — keep the two in sync. The H2 series
+// (H2C / H2D / H2D Pro / H2S) and X2D heat the chamber to 65 °C; X1E tops out
+// at 60 and its firmware clamps anything higher.
+export const MAX_CHAMBER_TEMP_C = 65;
+
 // G-code interchange families (#2578). Mirrors backend GCODE_COMPAT_FAMILIES
 // in backend/app/utils/printer_models.py — keep the two in sync. A sliced 3MF
 // may target a different model ONLY within its family; everything else is

frontend/src/utils/temperatureFanPresets.ts

@@ -10,6 +10,8 @@
  * is not part of the configurable triple.
  */
 
+import { MAX_CHAMBER_TEMP_C } from './printer';
+
 export type PresetTriple = readonly [number, number, number];
 
 export const NOZZLE_TEMP_DEFAULTS: PresetTriple = [120, 220, 260];
@@ -28,7 +30,7 @@ export interface PresetCategory {
 export const PRESET_CATEGORIES: readonly PresetCategory[] = [
   { key: 'nozzle_temp_presets', defaults: NOZZLE_TEMP_DEFAULTS, lo: 0, hi: 320, unit: 'C' },
   { key: 'bed_temp_presets', defaults: BED_TEMP_DEFAULTS, lo: 0, hi: 140, unit: 'C' },
-  { key: 'chamber_temp_presets', defaults: CHAMBER_TEMP_DEFAULTS, lo: 0, hi: 60, unit: 'C' },
+  { key: 'chamber_temp_presets', defaults: CHAMBER_TEMP_DEFAULTS, lo: 0, hi: MAX_CHAMBER_TEMP_C, unit: 'C' },
   { key: 'fan_speed_presets', defaults: FAN_SPEED_DEFAULTS, lo: 0, hi: 100, unit: '%' },
 ];