luci-app-pbr: update to 1.2.2-r6

[stangri]

Update luci-app-pbr from 1.2.1-r87 to 1.2.2-r6.
This release bumps compat to 25, fixes split-uplink WAN6 interface filtering in the rpcd backend, adds error handling to the status overview widget,
normalizes all README anchor links to kebab-case,
and updates the translation template.

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rpcdCompat bumped from 24 to 25.

get_supported_interfaces() now filters out the
WAN6 interface in split-uplink configurations so
it does not appear as a policy target in the UI.

Two filter points added:

1. _build_ifaces_supported() callback — When iterating netifd interfaces, skips any interface where is_split_uplink() is true and is_uplink6() matches. Prevents WAN6 from being added to the supported list.

2. Firewall zone enumeration loop — Same check applied when iterating interfaces from the firewall WAN zone. Skips WAN6 via continue before the is_supported_interface check.

Impact: In split-uplink setups (separate
interfaces for IPv4 and IPv6 uplinks), the WAN6
interface no longer appears in the policy target
dropdown. Policies should target the WAN4
interface; IPv6 routing follows automatically.

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Compat bumps:

• LuciCompat: 24 → 25
• ReadmeCompat: 1.2.1 → 1.2.2

README anchor link fixes (2 locations):

• #WarningMessagesDetails → #warning-messages-details
• #ErrorMessagesDetails → #error-messages-details

README anchor link fixes (10 locations):

Old Anchor	New Anchor
#ServiceConfigurationSettings	#service-configuration-settings
#StrictEnforcement	#strict-enforcement
#UseResolversSetSupport	#use-resolvers-set-support
#WireGuardServerUseCases (×2)	#wireguard-server-use-cases
#IgnoreTarget	#ignore-target
#PolicyOptions	#policy-options
#DNSPolicyOptions	#dns-policy-options
#DSCPTag-BasedPolicies	#dscp-tag-based-policies
#CustomUserFiles	#custom-user-files

All anchors converted from PascalCase to
kebab-case to match the current README heading
format.

Error handling added:

• Entire render() function body wrapped in try/catch block
• On exception, renders a yellow warning banner: "Unable to retrieve PBR status" instead of crashing the status page
• Prevents unhandled errors from breaking the LuCI overview when PBR data is malformed or unavailable

Data access simplified:

• Old: Verbose fallback object with explicit null fields (enabled: null, running: null, version: null, gateways: null, etc.)
• New: var reply = (data[0] && data[0][pkg.Name]) || {}; — single-line fallback to empty object
• All downstream property access already handles undefined values, making the verbose defaults unnecessary

No behavioral changes to the status table
rendering logic itself (Active/Inactive/Disabled
states, iptables/nft/fw4 mode detection).

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1 new string added:

• "Unable to retrieve %s status" — Error fallback message for the status overview widget

0 strings removed, 0 strings reworded.

All other changes are source line number updates
from the 72_pbr.js refactoring. Existing
translations remain valid; translators only need
to handle the 1 new entry.

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• rpcdCompat bumped from 24 to 25
• LuciCompat bumped from 24 to 25
• Requires companion pbr package >= 1.2.2 (for is_split_uplink() and is_uplink6() functions used by the rpcd backend)
• All existing RPC methods preserved; no new methods added
• All existing UI functionality preserved