rewards: claim what the chain pays, without recording a score first (#61)

* rewards: claim what the chain pays, without recording a score first

The People chain has no pezRewards.recordTrustScore and no userEpochScores since the payroll
started holding the roll still through each claim window: a claim pays the trust score at
claim time times the epoch's rate, plus the seat share for a Parlementer seat taken by the
time of the roll. The app still asked for the recorded score, so the claimable list was
always empty, and three screens offered a Record Trust Score button that signed a call that
does not exist.

The buttons, their handlers and texts, and the messages for an error and a success that can
no longer happen are removed; the claimable amount is worked out as the chain's entitlement
does, and the empty state shows in every epoch status. Past recordTrustScore extrinsics in
the transaction history keep their label.

* backend: body-parser 2.4.0 and ip-address 10.7.5

npm audit on the production dependencies: body-parser 2.0.0-2.3.0 (GHSA-27r3-jxmh-p828,
high, denial of service by trailing bytes after a compressed body) and ip-address <=10.7.3
(GHSA-rxp7-6hxx-x8q5, moderate). Lockfile only; npm audit --omit=dev finds nothing after.

* ops: lower the typecheck baseline to 335

Four TS2339 errors in shared/lib/scores.ts went with the userEpochScores code.

* web: dompurify 3.4.17 and zod 4.6.7

npm audit on the production dependencies: dompurify <=3.4.16 (critical: GHSA-cg2g-xh64-v4q7,
GHSA-mrv2-3pqr-j5jr, GHSA-c6gr-qvv4-5v3f) and zod <4.6.6 (high, GHSA-mrhx-c7xc-m3w5, fixed
only in 4.x). No code imports zod; it is here for abitype, whose peer range is
^3.22.0 || ^4.0.0. Typecheck ratchet, lint and the build are unchanged.

backend/package-lock.json

@@ -1005,18 +1005,18 @@
       "license": "MIT"
     },
     "node_modules/body-parser": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-2.3.0.tgz",
-      "integrity": "sha512-2cGmJupaNgg+QUwVLAucDuWuoMZ6EX9iHDRswZ5lsNYEmwPaRknMPCLZz07yTzVq/83p4o/wzbDZbBrTvGGTIw==",
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-2.4.0.tgz",
+      "integrity": "sha512-Ifk1KcLrxaGt1occQagQNFNNOqRt1LFuehEnHHzB8Z6cRgIxRU1TBaiIsUiCdA+gy5PL7Y1IX31DNKkRmxtXjQ==",
       "license": "MIT",
       "dependencies": {
         "bytes": "^3.1.2",
-        "content-type": "^2.0.0",
+        "content-type": "^2.1.0",
         "debug": "^4.4.3",
         "http-errors": "^2.0.1",
-        "iconv-lite": "^0.7.2",
+        "iconv-lite": "^0.7.3",
         "on-finished": "^2.4.1",
-        "qs": "^6.15.2",
+        "qs": "^6.16.1",
         "raw-body": "^3.0.2",
         "type-is": "^2.1.0"
       },
@@ -2048,9 +2048,9 @@
       }
     },
     "node_modules/iconv-lite": {
-      "version": "0.7.2",
-      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.7.2.tgz",
-      "integrity": "sha512-im9DjEDQ55s9fL4EYzOAv0yMqmMBSZp6G0VvFyTMPKWxiSBHUj9NW/qqLmXUwXrrM7AvqSlTCfvqRb0cM8yYqw==",
+      "version": "0.7.3",
+      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.7.3.tgz",
+      "integrity": "sha512-IKXpvIzjnC9XTAUbVBcMfGS0EPaIXtW6v+zr+RRp+hqULEpo0owZax6wyRwPOJbWbzjYspQwusTsfVr0ifh4uQ==",
       "license": "MIT",
       "dependencies": {
         "safer-buffer": ">= 2.1.2 < 3.0.0"
@@ -2135,9 +2135,9 @@
       "license": "ISC"
     },
     "node_modules/ip-address": {
-      "version": "10.7.3",
-      "resolved": "https://registry.npmjs.org/ip-address/-/ip-address-10.7.3.tgz",
-      "integrity": "sha512-A1kdq/tSb5QjvKvAMgIoEvDBIgL7qaqVP/jkvSwYYRZ9iEzvPpopxp2wQfu3SuZRHtpHNxMn8Fs0bS+gf5Xmwg==",
+      "version": "10.7.5",
+      "resolved": "https://registry.npmjs.org/ip-address/-/ip-address-10.7.5.tgz",
+      "integrity": "sha512-t2v0rkILYv9WXmSL7TpAaU3HXgaFYOPUcH3QHgwQ++gpJuH3bqyMy4Fvt/DJCTKwzH3Cf+bAp5W/mFL39KPLzA==",
       "license": "MIT",
       "optional": true,
       "engines": {
@@ -2966,9 +2966,9 @@
       }
     },
     "node_modules/qs": {
-      "version": "6.16.0",
-      "resolved": "https://registry.npmjs.org/qs/-/qs-6.16.0.tgz",
-      "integrity": "sha512-h6fhOIaRrID2CbEY2fqs+7t+UXZo+MLAnU5gRIq85uFtdiUPCdsApMlHhXogKVM4HM2DVbIjGNTTYH2OcmP1vA==",
+      "version": "6.16.1",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.16.1.tgz",
+      "integrity": "sha512-5Px6J7rfHBAGUhNQ3es4YzcOdBBw0SDcVtThJml4RdnKw4tKs2epA0kPZ+K8X+WiHktT93RHVcQ/3ym5aTCgtg==",
       "license": "BSD-3-Clause",
       "dependencies": {
         "es-define-property": "^1.0.1",