feat(auth): Anmeldung mit Passwort und OIDC, Schutz aller Seiten (#013)

Signierte Sitzungs-Cookies mit jose, OIDC ueber openid-client (authentik),
Schutz in proxy.ts, Anmeldeseite, Audit-Log-Ansicht, Sicherheits-Kopfzeilen und
Rate-Limit. Kein Auth.js, weil Version 5 Beta ist. 147 Tests.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "proxledger",
-  "version": "0.7.0",
+  "version": "0.8.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "proxledger",
-      "version": "0.7.0",
+      "version": "0.8.0",
       "hasInstallScript": true,
       "dependencies": {
         "@node-rs/argon2": "^2.2.1",
@@ -17,8 +17,10 @@
         "bootstrap": "^5.3.8",
         "bootstrap-icons": "^1.13.1",
         "croner": "^10.0.1",
+        "jose": "^6.2.12",
         "next": "16.3.5",
         "nodemailer": "^10.0.10",
+        "openid-client": "^6.8.8",
         "react": "19.2.8",
         "react-dom": "19.2.8",
         "zod": "^4.6.5"
@@ -7211,6 +7213,15 @@
         "jiti": "lib/jiti-cli.mjs"
       }
     },
+    "node_modules/jose": {
+      "version": "6.2.12",
+      "resolved": "https://registry.npmjs.org/jose/-/jose-6.2.12.tgz",
+      "integrity": "sha512-9NiFmJEex0sy2Dk58j2UGBSHgUs2ypF9eZSu4L6vjOX3Dp96Sw1F3uL+H+D1sx02jZZdzUT0HgvCy59CuvXcWw==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/panva"
+      }
+    },
     "node_modules/js-tokens": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
@@ -7981,6 +7992,15 @@
         "svg-arc-to-cubic-bezier": "^3.0.0"
       }
     },
+    "node_modules/oauth4webapi": {
+      "version": "3.8.8",
+      "resolved": "https://registry.npmjs.org/oauth4webapi/-/oauth4webapi-3.8.8.tgz",
+      "integrity": "sha512-8N28E+a/oxfXWBgOMt+ZP/JUf/XR+IFbvkAEPP3gznXOMv9BpAAwiIj0TFNz3tGTPc0ZQ8zmWBNgN1nAys0gng==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/panva"
+      }
+    },
     "node_modules/object-assign": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
@@ -8124,6 +8144,19 @@
       "devOptional": true,
       "license": "MIT"
     },
+    "node_modules/openid-client": {
+      "version": "6.8.8",
+      "resolved": "https://registry.npmjs.org/openid-client/-/openid-client-6.8.8.tgz",
+      "integrity": "sha512-ZsucJA5Ad04Uv7YN4ql+s4GXNmb9uAYQwyJTsJx7CH/MX3JZioLE2pVKi1SC+YrbSLA4Px3Gi30dMjgOZtb6pA==",
+      "license": "MIT",
+      "dependencies": {
+        "jose": "^6.2.12",
+        "oauth4webapi": "^3.8.8"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/panva"
+      }
+    },
     "node_modules/optionator": {
       "version": "0.9.4",
       "resolved": "https://registry.npmjs.org/optionator/-/optionator-0.9.4.tgz",