feat: background quota refresh for idle accounts

package.json

@@ -9,7 +9,7 @@
     "build": "bun run --cwd packages/core build && bun run --cwd packages/opencode build && bun run --cwd packages/pi build",
     "typecheck": "bun run --cwd packages/core build && bun run --cwd packages/opencode typecheck && bun run --cwd packages/pi typecheck && tsc -p tsconfig.scripts.json",
     "test": "bun run --cwd packages/core build && bun test --isolate packages/core/src packages/opencode/src packages/pi/src test/",
-    "test:e2e": "bun test --isolate ./packages/e2e-tests/src/plugin-flow.e2e.test.ts ./packages/e2e-tests/src/cli-flow.e2e.test.ts ./packages/e2e-tests/src/rpc-tui-flow.e2e.test.ts ./packages/e2e-tests/src/fetch-guard.test.ts",
+    "test:e2e": "bun test --isolate ./packages/e2e-tests/src/plugin-flow.e2e.test.ts ./packages/e2e-tests/src/cli-flow.e2e.test.ts ./packages/e2e-tests/src/rpc-tui-flow.e2e.test.ts ./packages/e2e-tests/src/fetch-guard.test.ts ./packages/e2e-tests/src/mock-antigravity-server.test.ts",
     "test:e2e:models": "bun run --cwd packages/opencode test:e2e:models",
     "test:e2e:regression": "bun run --cwd packages/opencode test:e2e:regression",
     "prepublishOnly": "bun run build",

packages/core/src/__fixtures__/quota/free-ruqs.json

@@ -0,0 +1,32 @@
+{
+  "groups": [
+    {
+      "buckets": [
+        {
+          "bucketId": "gemini-weekly",
+          "displayName": "Weekly Limit",
+          "window": "weekly",
+          "resetTime": "2026-07-31T15:54:18Z",
+          "description": "You have used some of your weekly limit, it will fully refresh in 6 days, 22 hours.",
+          "remainingFraction": 0.8875432
+        }
+      ],
+      "displayName": "Gemini Models",
+      "description": "Models within this group: Gemini Flash, Gemini Pro"
+    },
+    {
+      "buckets": [
+        {
+          "bucketId": "3p-weekly",
+          "displayName": "Weekly Limit",
+          "window": "weekly",
+          "resetTime": "2026-07-31T17:19:52Z",
+          "remainingFraction": 1
+        }
+      ],
+      "displayName": "Claude and GPT models",
+      "description": "Models within this group: Claude Opus, Claude Sonnet, GPT-OSS"
+    }
+  ],
+  "description": "Within each group, models share a weekly limit. Quota is consumed proportionally to the cost of the tokens. Thus, limits will last longer with shorter tasks or using more cost-effective models. Your weekly limit is tied directly to your individual tier."
+}

packages/core/src/__fixtures__/quota/pro-ruqs.json

@@ -0,0 +1,49 @@
+{
+  "groups": [
+    {
+      "buckets": [
+        {
+          "bucketId": "gemini-weekly",
+          "displayName": "Weekly Limit",
+          "window": "weekly",
+          "resetTime": "2026-07-28T18:24:21Z",
+          "description": "You have used some of your weekly limit, it will fully refresh in 4 days, 1 hour.",
+          "remainingFraction": 0.9214085
+        },
+        {
+          "bucketId": "gemini-5h",
+          "displayName": "Five Hour Limit",
+          "window": "5h",
+          "resetTime": "2026-07-24T20:43:21Z",
+          "description": "You have used some of your 5-hour limit, it will fully refresh in 3 hours, 25 minutes.",
+          "remainingFraction": 0.9885728
+        }
+      ],
+      "displayName": "Gemini Models",
+      "description": "Models within this group: Gemini Flash, Gemini Pro"
+    },
+    {
+      "buckets": [
+        {
+          "bucketId": "3p-weekly",
+          "displayName": "Weekly Limit",
+          "window": "weekly",
+          "resetTime": "2026-07-31T13:41:52Z",
+          "description": "You have used some of your weekly limit, it will fully refresh in 6 days, 20 hours.",
+          "remainingFraction": 0.9852099
+        },
+        {
+          "bucketId": "3p-5h",
+          "displayName": "Five Hour Limit",
+          "window": "5h",
+          "resetTime": "2026-07-24T18:41:52Z",
+          "description": "You have used some of your 5-hour limit, it will fully refresh in 1 hour, 23 minutes.",
+          "remainingFraction": 0.9556296
+        }
+      ],
+      "displayName": "Claude and GPT models",
+      "description": "Models within this group: Claude Opus, Claude Sonnet, GPT-OSS"
+    }
+  ],
+  "description": "Within each group, models share a weekly limit and a 5-hour limit. Quota is consumed proportionally to the cost of the tokens. Thus, limits will last longer with shorter tasks or using more cost-effective models. The 5-hour limit smooths out aggregate demand to fairly distribute global capacity across all users, while your weekly limit is tied directly to your individual tier."
+}