ui(cat): trim verbose Kenwood/CAT-sharing help text

Removed the long explanatory hints under the Kenwood COM/baud/host, data-mode,
CAT-trace and PTT-hotkey fields; shortened the CAT-sharing hint to just the
client setup line; and replaced the DTR/RTS hint with a one-liner. Less clutter
in the CAT settings.

frontend/src/components/SettingsModal.tsx

@@ -2595,9 +2595,7 @@ export function SettingsModal({ onClose, onSaved, initialSection, onMainPaneChan
                 <label className="flex items-center gap-2 text-sm cursor-pointer">
                   <Checkbox checked={civTrace} onCheckedChange={(c) => { setCivTrace(!!c); SetCIVTrace(!!c); }} />
                   {t('cat.civTrace')}
-                </label>
-                <p className="text-[10px] text-muted-foreground mt-1">{t('cat.civTraceHint')}</p>
-              </div>
+                </label>              </div>
             )}
             {catCfg.backend === 'kenwood' && (
             <>
@@ -2613,9 +2611,7 @@ export function SettingsModal({ onClose, onSaved, initialSection, onMainPaneChan
                   </Select>
                   <Button type="button" variant="outline" size="sm"
                     onClick={() => ListSerialPorts().then((p) => setWkPorts((p ?? []) as string[])).catch(() => {})}>↻</Button>
-                </div>
-                <span className="text-xs text-muted-foreground">{t('cat.kenwoodPortHint')}</span>
-              </div>
+                </div>              </div>
               <div className="space-y-1">
                 <Label>{t('cat.baud')}</Label>
                 <Select value={String(catCfg.kenwood_baud || 9600)} onValueChange={(v) => setCatCfg((s) => ({ ...s, kenwood_baud: parseInt(v) || 9600 }))}>
@@ -2623,18 +2619,14 @@ export function SettingsModal({ onClose, onSaved, initialSection, onMainPaneChan
                   <SelectContent>
                     {[4800, 9600, 19200, 38400, 57600, 115200].map((r) => <SelectItem key={r} value={String(r)}>{r}</SelectItem>)}
                   </SelectContent>
-                </Select>
-                <span className="text-xs text-muted-foreground">{t('cat.kenwoodBaudHint')}</span>
-              </div>
+                </Select>              </div>
               <div className="space-y-1">
                 <Label>{t('cat.kenwoodHost')}</Label>
                 <Input
                   value={catCfg.kenwood_host || ''}
                   placeholder="192.168.1.50:4532"
                   onChange={(e) => setCatCfg((s) => ({ ...s, kenwood_host: e.target.value }))}
-                />
-                <span className="text-xs text-muted-foreground">{t('cat.kenwoodHostHint')}</span>
-              </div>
+                />              </div>
               <div className="space-y-1">
                 <label className="flex items-center gap-2 text-xs cursor-pointer">
                   <Checkbox checked={!!catCfg.kenwood_low_lines} onCheckedChange={(c) => setCatCfg((s) => ({ ...s, kenwood_low_lines: !!c }))} />
@@ -2651,9 +2643,7 @@ export function SettingsModal({ onClose, onSaved, initialSection, onMainPaneChan
                     <SelectItem value="data">{t('cat.kwDataMd6')}</SelectItem>
                     <SelectItem value="keep">{t('cat.kwDataKeep')}</SelectItem>
                   </SelectContent>
-                </Select>
-                <span className="text-xs text-muted-foreground">{t('cat.kwDataHint')}</span>
-              </div>
+                </Select>              </div>
             </>
             )}
             {catCfg.backend === 'icom' && (
@@ -2867,9 +2857,7 @@ export function SettingsModal({ onClose, onSaved, initialSection, onMainPaneChan
                     onCheckedChange={(c) => setCatCfg((s) => ({ ...s, ptt_hotkey_toggle: !!c } as any))}
                   />
                   {t('cat.pttKeyToggle')}
-                </label>
-                <p className="text-[11px] text-muted-foreground">{t('cat.pttKeyHint')}</p>
-              </>
+                </label>              </>
             )}
           </div>
           {catCfg.backend === 'omnirig' && (