Expose ban-time escalation settings in jail detail and config UI

- Backend: Add BantimeEscalation + BantimeEscalationUpdate Pydantic models
  to app/models/config.py; add bantime_escalation field to Jail in jail.py
- Backend: jail_service.get_jail_detail() fetches 7 bantime.* socket commands
  (increment, factor, formula, multipliers, maxtime, rndtime, overalljails)
  and populates bantime_escalation on the returned Jail object
- Backend: config_service.get_jail_config() fetches same 7 commands;
  update_jail_config() writes escalation fields when provided
- Frontend: Add BantimeEscalation + BantimeEscalationUpdate interfaces to
  types/config.ts; extend JailConfig + JailConfigUpdate; extend Jail in
  types/jail.ts
- Frontend: JailDetailPage.tsx adds BantimeEscalationSection component that
  renders only when increment is enabled (shows factor, formula, multipliers,
  max_time, rnd_time, overall_jails)
- Frontend: ConfigPage.tsx JailAccordionPanel adds full escalation edit form
  (Switch for enable/disable, number inputs for factor/max_time/rnd_time,
  text inputs for formula/multipliers, Switch for overall_jails);
  handleSave includes bantime_escalation in the JailConfigUpdate payload
- Tests: Update ConfigPageLogPath.test.tsx mock to include bantime_escalation:null
- Docs: Mark Task 6 as DONE in Tasks.md

frontend/src/pages/ConfigPage.tsx

@@ -65,6 +65,7 @@ import {
 } from "../api/config";
 import type {
   AddLogPathRequest,
+  BantimeEscalationUpdate,
   ConfFileEntry,
   GlobalConfigUpdate,
   JailConfig,
@@ -260,6 +261,16 @@ function JailAccordionPanel({
   const [saving, setSaving] = useState(false);
   const [msg, setMsg] = useState<{ text: string; ok: boolean } | null>(null);
 
+  // Ban-time escalation state (mirrors jail.bantime_escalation or defaults).
+  const esc0 = jail.bantime_escalation;
+  const [escEnabled, setEscEnabled] = useState(esc0?.increment ?? false);
+  const [escFactor, setEscFactor] = useState(esc0?.factor != null ? String(esc0.factor) : "");
+  const [escFormula, setEscFormula] = useState(esc0?.formula ?? "");
+  const [escMultipliers, setEscMultipliers] = useState(esc0?.multipliers ?? "");
+  const [escMaxTime, setEscMaxTime] = useState(esc0?.max_time != null ? String(esc0.max_time) : "");
+  const [escRndTime, setEscRndTime] = useState(esc0?.rnd_time != null ? String(esc0.rnd_time) : "");
+  const [escOverallJails, setEscOverallJails] = useState(esc0?.overall_jails ?? false);
+
   const handleDeleteLogPath = useCallback(
     async (path: string) => {
       setDeletingPath(path);
@@ -305,12 +316,22 @@ function JailAccordionPanel({
     setSaving(true);
     setMsg(null);
     try {
+      const escalation: BantimeEscalationUpdate = {
+        increment: escEnabled,
+        factor: escFactor !== "" ? Number(escFactor) : null,
+        formula: escFormula !== "" ? escFormula : null,
+        multipliers: escMultipliers !== "" ? escMultipliers : null,
+        max_time: escMaxTime !== "" ? Number(escMaxTime) : null,
+        rnd_time: escRndTime !== "" ? Number(escRndTime) : null,
+        overall_jails: escOverallJails,
+      };
       await onSave(jail.name, {
         ban_time: Number(banTime) || jail.ban_time,
         find_time: Number(findTime) || jail.find_time,
         max_retry: Number(maxRetry) || jail.max_retry,
         fail_regex: failRegex,
         ignore_regex: ignoreRegex,
+        bantime_escalation: escalation,
       });
       setMsg({ text: "Saved.", ok: true });
     } catch (err: unknown) {
@@ -325,6 +346,13 @@ function JailAccordionPanel({
     maxRetry,
     failRegex,
     ignoreRegex,
+    escEnabled,
+    escFactor,
+    escFormula,
+    escMultipliers,
+    escMaxTime,
+    escRndTime,
+    escOverallJails,
     jail.ban_time,
     jail.find_time,
     jail.max_retry,
@@ -459,6 +487,77 @@ function JailAccordionPanel({
           </div>
         </Field>
       )}
+
+      {/* Ban-time Escalation */}
+      <div style={{ marginTop: tokens.spacingVerticalM }}>
+        <Text weight="semibold" size={400} block>
+          Ban-time Escalation
+        </Text>
+        <Switch
+          label="Enable incremental banning"
+          checked={escEnabled}
+          onChange={(_e, d) => {
+            setEscEnabled(d.checked);
+          }}
+        />
+        {escEnabled && (
+          <div>
+            <div className={styles.fieldRowThree}>
+              <Field label="Factor">
+                <Input
+                  type="number"
+                  value={escFactor}
+                  onChange={(_e, d) => {
+                    setEscFactor(d.value);
+                  }}
+                />
+              </Field>
+              <Field label="Max Time (s)">
+                <Input
+                  type="number"
+                  value={escMaxTime}
+                  onChange={(_e, d) => {
+                    setEscMaxTime(d.value);
+                  }}
+                />
+              </Field>
+              <Field label="Random Jitter (s)">
+                <Input
+                  type="number"
+                  value={escRndTime}
+                  onChange={(_e, d) => {
+                    setEscRndTime(d.value);
+                  }}
+                />
+              </Field>
+            </div>
+            <Field label="Formula">
+              <Input
+                value={escFormula}
+                onChange={(_e, d) => {
+                  setEscFormula(d.value);
+                }}
+              />
+            </Field>
+            <Field label="Multipliers (space-separated)">
+              <Input
+                value={escMultipliers}
+                onChange={(_e, d) => {
+                  setEscMultipliers(d.value);
+                }}
+              />
+            </Field>
+            <Switch
+              label="Count repeat offences across all jails"
+              checked={escOverallJails}
+              onChange={(_e, d) => {
+                setEscOverallJails(d.checked);
+              }}
+            />
+          </div>
+        )}
+      </div>
+
       <div className={styles.buttonRow}>
         <Button
           appearance="primary"