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

backend/app/models/config.py

@@ -5,6 +5,60 @@ Request, response, and domain models for the config router and service.
 
 from pydantic import BaseModel, ConfigDict, Field
 
+# ---------------------------------------------------------------------------
+# Ban-time escalation
+# ---------------------------------------------------------------------------
+
+
+class BantimeEscalation(BaseModel):
+    """Incremental ban-time escalation configuration for a jail."""
+
+    model_config = ConfigDict(strict=True)
+
+    increment: bool = Field(
+        default=False,
+        description="Whether incremental banning is enabled.",
+    )
+    factor: float | None = Field(
+        default=None,
+        description="Multiplier applied to the base ban time on each repeat offence.",
+    )
+    formula: str | None = Field(
+        default=None,
+        description="Python expression evaluated to compute the escalated ban time.",
+    )
+    multipliers: str | None = Field(
+        default=None,
+        description="Space-separated integers used as per-offence multipliers.",
+    )
+    max_time: int | None = Field(
+        default=None,
+        description="Maximum ban duration in seconds when escalation is active.",
+    )
+    rnd_time: int | None = Field(
+        default=None,
+        description="Random jitter (seconds) added to each escalated ban time.",
+    )
+    overall_jails: bool = Field(
+        default=False,
+        description="Count repeat offences across all jails, not just the current one.",
+    )
+
+
+class BantimeEscalationUpdate(BaseModel):
+    """Partial update payload for ban-time escalation settings."""
+
+    model_config = ConfigDict(strict=True)
+
+    increment: bool | None = Field(default=None)
+    factor: float | None = Field(default=None)
+    formula: str | None = Field(default=None)
+    multipliers: str | None = Field(default=None)
+    max_time: int | None = Field(default=None)
+    rnd_time: int | None = Field(default=None)
+    overall_jails: bool | None = Field(default=None)
+
+
 # ---------------------------------------------------------------------------
 # Jail configuration models
 # ---------------------------------------------------------------------------
@@ -26,6 +80,10 @@ class JailConfig(BaseModel):
     log_encoding: str = Field(default="UTF-8", description="Log file encoding.")
     backend: str = Field(default="polling", description="Log monitoring backend.")
     actions: list[str] = Field(default_factory=list, description="Names of actions attached to this jail.")
+    bantime_escalation: BantimeEscalation | None = Field(
+        default=None,
+        description="Incremental ban-time escalation settings, or None if not configured.",
+    )
 
 
 class JailConfigResponse(BaseModel):
@@ -58,6 +116,10 @@ class JailConfigUpdate(BaseModel):
     date_pattern: str | None = Field(default=None)
     dns_mode: str | None = Field(default=None, description="DNS lookup mode: raw | warn | no.")
     enabled: bool | None = Field(default=None)
+    bantime_escalation: BantimeEscalationUpdate | None = Field(
+        default=None,
+        description="Incremental ban-time escalation settings to update.",
+    )
 
 
 # ---------------------------------------------------------------------------

backend/app/models/jail.py

@@ -5,6 +5,8 @@ Request, response, and domain models used by the jails router and service.
 
 from pydantic import BaseModel, ConfigDict, Field
 
+from app.models.config import BantimeEscalation
+
 
 class JailStatus(BaseModel):
     """Runtime metrics for a single jail."""
@@ -37,6 +39,10 @@ class Jail(BaseModel):
     ban_time: int = Field(..., description="Duration (seconds) of a ban. -1 means permanent.")
     max_retry: int = Field(..., description="Number of failures before a ban is issued.")
     actions: list[str] = Field(default_factory=list, description="Names of actions attached to this jail.")
+    bantime_escalation: BantimeEscalation | None = Field(
+        default=None,
+        description="Incremental ban-time escalation settings, or None if not configured.",
+    )
     status: JailStatus | None = Field(default=None, description="Runtime counters.")