施工(HEL-226): 实现登录门户与本机免密切换账号

用设备 Cookie 和授权表记住本机已验证账号，登录页按确认样图做成门户，不再把密码写进浏览器。

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

config/api.config.json

@@ -128,6 +128,20 @@
       "feature": "auction",
       "access": "authenticated"
     },
+    {
+      "method": "GET",
+      "path": "/api/auth/accounts",
+      "match": "exact",
+      "feature": "auth",
+      "access": "public"
+    },
+    {
+      "method": "POST",
+      "path": "/api/auth/forget",
+      "match": "exact",
+      "feature": "auth",
+      "access": "public"
+    },
     {
       "method": "POST",
       "path": "/api/auth/login",
@@ -156,6 +170,13 @@
       "feature": "auth",
       "access": "public"
     },
+    {
+      "method": "POST",
+      "path": "/api/auth/switch",
+      "match": "exact",
+      "feature": "auth",
+      "access": "public"
+    },
     {
       "method": "POST",
       "path": "/api/backfill",

config/architecture-inventory.json

@@ -10,10 +10,10 @@
   },
   "counts": {
     "primary_pages": 16,
-    "api_exact_paths": 53,
+    "api_exact_paths": 56,
     "api_prefixes": 0,
     "api_patterns": 11,
-    "database_tables": 36,
+    "database_tables": 37,
     "frontend_page_fragments": 12
   },
   "pages": [
@@ -96,10 +96,13 @@
       "/api/assistant/chat",
       "/api/assistant/messages",
       "/api/auction",
+      "/api/auth/accounts",
+      "/api/auth/forget",
       "/api/auth/login",
       "/api/auth/logout",
       "/api/auth/me",
       "/api/auth/register",
+      "/api/auth/switch",
       "/api/backfill",
       "/api/chart/intraday",
       "/api/dashboard",
@@ -189,6 +192,7 @@
     "assistant_messages",
     "heaven_readings",
     "job_runs",
+    "account_switch_grants",
     "schema_migrations"
   ],
   "background_job_methods": [
@@ -370,10 +374,10 @@
     }
   ],
   "css_layers": [
-    "/shared/tokens.css?v=20260820-3",
+    "/shared/tokens.css?v=20260829-1",
     "/shared/base.css?v=20260806-1",
     "/shared/shell.css?v=20260820-8",
-    "/shared/auth.css?v=20260820-5",
+    "/shared/auth.css?v=20260829-1",
     "/shared/components/controls.css?v=20260820-2",
     "/shared/components/navigation.css?v=20260820-1",
     "/shared/components/cards.css?v=20260820-1",
@@ -461,8 +465,8 @@
     },
     {
       "path": "frontend/index.html",
-      "bytes": 47871,
-      "lines": 661
+      "bytes": 48037,
+      "lines": 663
     },
     {
       "path": "backend/features/screener/catalog.py",
@@ -551,8 +555,8 @@
     },
     {
       "path": "frontend/shared/session.js",
-      "bytes": 13176,
-      "lines": 293
+      "bytes": 12848,
+      "lines": 283
     },
     {
       "path": "backend/features/market/insights_auction_data.py",
@@ -716,8 +720,8 @@
     },
     {
       "path": "backend/http/dispatch.py",
-      "bytes": 4118,
-      "lines": 115
+      "bytes": 4196,
+      "lines": 117
     },
     {
       "path": "frontend/shared/table.js",
@@ -734,16 +738,16 @@
       "bytes": 3369,
       "lines": 81
     },
+    {
+      "path": "frontend/app.js",
+      "bytes": 3337,
+      "lines": 95
+    },
     {
       "path": "frontend/pages/themes/page.html",
       "bytes": 3316,
       "lines": 55
     },
-    {
-      "path": "frontend/app.js",
-      "bytes": 3201,
-      "lines": 93
-    },
     {
       "path": "backend/features/market/insights_context.py",
       "bytes": 3175,
@@ -761,7 +765,7 @@
     },
     {
       "path": "backend/features/accounts/application.py",
-      "bytes": 2442,
+      "bytes": 2514,
       "lines": 63
     },
     {
@@ -849,6 +853,11 @@
       "bytes": 1143,
       "lines": 19
     },
+    {
+      "path": "backend/features/accounts/routes.py",
+      "bytes": 908,
+      "lines": 25
+    },
     {
       "path": "backend/features/popularity/routes.py",
       "bytes": 822,
@@ -859,11 +868,6 @@
       "bytes": 817,
       "lines": 23
     },
-    {
-      "path": "backend/features/accounts/routes.py",
-      "bytes": 803,
-      "lines": 22
-    },
     {
       "path": "backend/features/sentiment/routes.py",
       "bytes": 724,