fix(ci): use local paths for host-mode Gitea runner

- Replace actions/checkout with git pull + local working-directory
- Fixes corp proxy blocking GitHub action downloads

.gitea/workflows/ci.yml

@@ -9,7 +9,6 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  COMMON_PLAT: /Users/sd9235/code/mygh/learning_ai_common_plat
   DB_PROVIDER: memory
   JWT_SECRET: ci-test-secret-at-least-32-characters-long
 
@@ -17,11 +16,15 @@ jobs:
   backend:
     name: Backend — typecheck + test + build
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: /Users/sd9235/code/mygh/learning_ai_notes
     steps:
-      - uses: actions/checkout@v4
+      - name: Pull latest
+        run: git pull --ff-only origin main || true
 
       - name: Build @bytelyst/* packages
-        working-directory: ${{ env.COMMON_PLAT }}
+        working-directory: /Users/sd9235/code/mygh/learning_ai_common_plat
         run: pnpm install --frozen-lockfile && pnpm build
 
       - name: Install workspace dependencies
@@ -39,11 +42,15 @@ jobs:
   web:
     name: Web — typecheck + test + build
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: /Users/sd9235/code/mygh/learning_ai_notes
     steps:
-      - uses: actions/checkout@v4
+      - name: Pull latest
+        run: git pull --ff-only origin main || true
 
       - name: Build @bytelyst/* packages
-        working-directory: ${{ env.COMMON_PLAT }}
+        working-directory: /Users/sd9235/code/mygh/learning_ai_common_plat
         run: pnpm install --frozen-lockfile && pnpm build
 
       - name: Install workspace dependencies
@@ -61,11 +68,15 @@ jobs:
   mobile:
     name: Mobile — typecheck
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: /Users/sd9235/code/mygh/learning_ai_notes
     steps:
-      - uses: actions/checkout@v4
+      - name: Pull latest
+        run: git pull --ff-only origin main || true
 
       - name: Build @bytelyst/* packages
-        working-directory: ${{ env.COMMON_PLAT }}
+        working-directory: /Users/sd9235/code/mygh/learning_ai_common_plat
         run: pnpm install --frozen-lockfile && pnpm build
 
       - name: Install workspace dependencies