diff --git a/.github/workflows/PR-Auto-Deploy-V2.yml b/.github/workflows/PR-Auto-Deploy-V2.yml
index 50be9fe4cf..1ae657fa76 100644
--- a/.github/workflows/PR-Auto-Deploy-V2.yml
+++ b/.github/workflows/PR-Auto-Deploy-V2.yml
@@ -26,6 +26,10 @@ jobs:
   check-pr:
     if: (github.event_name == 'pull_request' && github.event.action != 'closed') || github.event_name == 'workflow_dispatch'
     runs-on: ubuntu-latest
+    # Only reads the PR via pulls.get with the default GITHUB_TOKEN.
+    permissions:
+      contents: read
+      pull-requests: read
     outputs:
       should_deploy: ${{ steps.decide.outputs.should_deploy }}
       is_fork: ${{ steps.resolve.outputs.is_fork }}
@@ -97,6 +101,7 @@ jobs:
           echo "allow_fork=${allow_fork:-false}" >> $GITHUB_OUTPUT
 
   deploy-v2-pr:
+    environment: pr-preview
     needs: check-pr
     runs-on: ubuntu-latest
     if: needs.check-pr.outputs.should_deploy == 'true' && (needs.check-pr.outputs.is_fork == 'false' || needs.check-pr.outputs.allow_fork == 'true')
@@ -107,6 +112,7 @@ jobs:
     permissions:
       contents: read
       issues: write
+      packages: write
       pull-requests: write
     env:
       # Single source of truth for whether this preview embeds the admin portal:
@@ -125,20 +131,11 @@ jobs:
           repository: ${{ github.repository }}
           ref: main
 
-      - name: Setup GitHub App Bot
-        if: github.actor != 'dependabot[bot]'
-        id: setup-bot
-        uses: ./.github/actions/setup-bot
-        continue-on-error: true
-        with:
-          app-id: ${{ secrets.GH_APP_ID }}
-          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
-
       - name: Add deployment started comment
         id: deployment-started
         uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         with:
-          github-token: ${{ steps.setup-bot.outputs.token }}
+          github-token: ${{ github.token }}
           script: |
             const { owner, repo } = context.repo;
             const prNumber = ${{ needs.check-pr.outputs.pr_number }};
@@ -180,7 +177,8 @@ jobs:
         with:
           repository: ${{ needs.check-pr.outputs.pr_repository }}
           ref: ${{ needs.check-pr.outputs.pr_ref }}
-          token: ${{ secrets.GITHUB_TOKEN }}
+          # untrusted tree is built below - never leave credentials in .git/config
+          persist-credentials: false
           fetch-depth: 0 # Fetch full history for commit hash detection
 
       - name: Set up Docker Buildx
@@ -192,11 +190,16 @@ jobs:
           VERSION=$(grep "^version =" build.gradle | awk -F'"' '{print $2}')
           echo "versionNumber=$VERSION" >> $GITHUB_OUTPUT
 
-      - name: Login to Docker Hub
+      - name: Login to GitHub Container Registry
         uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4.6.0
         with:
-          username: ${{ secrets.DOCKER_HUB_USERNAME }}
-          password: ${{ secrets.DOCKER_HUB_API }}
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ github.token }}
+
+      - name: Convert repository owner to lowercase
+        id: repoowner
+        run: echo "lowercase=$(echo ${{ github.repository_owner }} | awk '{print tolower($0)}')" >> $GITHUB_OUTPUT
 
       - name: Get commit hash for app
         id: commit-hash
@@ -220,7 +223,7 @@ jobs:
       - name: Check if image exists
         id: check-image
         run: |
-          if docker manifest inspect ${{ secrets.DOCKER_HUB_USERNAME }}/test:v2-${{ steps.commit-hash.outputs.app_short }} >/dev/null 2>&1; then
+          if docker manifest inspect ${IMAGE_BASE}:v2-${{ steps.commit-hash.outputs.app_short }} >/dev/null 2>&1; then
             echo "exists=true" >> $GITHUB_OUTPUT
             echo "Image already exists, skipping build"
           else
@@ -228,6 +231,8 @@ jobs:
             echo "Image needs to be built"
           fi
 
+        env:
+          IMAGE_BASE: ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test
       - name: Build and push V2 image
         if: steps.check-image.outputs.exists == 'false'
         uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7.3.0
@@ -237,7 +242,7 @@ jobs:
           push: true
           cache-from: type=gha,scope=stirling-pdf-latest
           cache-to: type=gha,mode=max,scope=stirling-pdf-latest
-          tags: ${{ secrets.DOCKER_HUB_USERNAME }}/test:v2-${{ steps.commit-hash.outputs.app_short }}
+          tags: ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test:v2-${{ steps.commit-hash.outputs.app_short }}
           build-args: |
             VERSION_TAG=v2-alpha
             BUILD_PORTAL=${{ env.BUILD_PORTAL }}
@@ -246,9 +251,11 @@ jobs:
       - name: Set up SSH
         run: |
           mkdir -p ~/.ssh/
-          echo "${{ secrets.NEW_VPS_SSH_KEY }}" > ../private.key
+          echo "${NEW_VPS_SSH_KEY}" > ../private.key
           sudo chmod 600 ../private.key
 
+        env:
+          NEW_VPS_SSH_KEY: ${{ secrets.NEW_VPS_SSH_KEY }}
       - name: Deploy V2 to VPS
         id: deploy
         run: |
@@ -261,7 +268,7 @@ jobs:
           services:
             stirling-pdf-v2:
               container_name: stirling-pdf-v2-pr-${{ needs.check-pr.outputs.pr_number }}
-              image: ${{ secrets.DOCKER_HUB_USERNAME }}/test:v2-${{ steps.commit-hash.outputs.app_short }}
+              image: ${IMAGE_BASE}:v2-${{ steps.commit-hash.outputs.app_short }}
               ports:
                 - "${V2_PORT}:8080"
               volumes:
@@ -273,8 +280,8 @@ jobs:
                 DISABLE_ADDITIONAL_FEATURES: "false"
                 STIRLING_BILLING_ACCOUNT_LINK_ENABLED: "true"
                 SECURITY_ENABLELOGIN: "true"
-                SECURITY_INITIALLOGIN_USERNAME: "${{ secrets.TEST_LOGIN_USERNAME }}"
-                SECURITY_INITIALLOGIN_PASSWORD: "${{ secrets.TEST_LOGIN_PASSWORD }}"
+                SECURITY_INITIALLOGIN_USERNAME: "${TEST_LOGIN_USERNAME}"
+                SECURITY_INITIALLOGIN_PASSWORD: "${TEST_LOGIN_PASSWORD}"
                 SYSTEM_DEFAULTLOCALE: en-US
                 UI_APPNAME: "Stirling-PDF V2 PR#${{ needs.check-pr.outputs.pr_number }}"
                 UI_HOMEDESCRIPTION: "V2 PR#${{ needs.check-pr.outputs.pr_number }} - Embedded Architecture"
@@ -288,9 +295,9 @@ jobs:
           EOF
 
           # Deploy to VPS
-          scp -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null docker-compose.yml ${{ secrets.NEW_VPS_USERNAME }}@${{ secrets.NEW_VPS_HOST }}:/tmp/docker-compose-v2.yml
+          scp -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null docker-compose.yml ${NEW_VPS_USERNAME}@${NEW_VPS_HOST}:/tmp/docker-compose-v2.yml
 
-          ssh -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -T ${{ secrets.NEW_VPS_USERNAME }}@${{ secrets.NEW_VPS_HOST }} << ENDSSH
+          ssh -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -T ${NEW_VPS_USERNAME}@${NEW_VPS_HOST} << ENDSSH
             # Create V2 PR-specific directories
             mkdir -p /stirling/V2-PR-${{ needs.check-pr.outputs.pr_number }}/{data,config,logs,storage}
 
@@ -315,6 +322,13 @@ jobs:
           # Set port for output
           echo "v2_port=${V2_PORT}" >> $GITHUB_OUTPUT
 
+        env:
+          IMAGE_BASE: ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test
+          TEST_LOGIN_USERNAME: ${{ secrets.TEST_LOGIN_USERNAME }}
+          TEST_LOGIN_PASSWORD: ${{ secrets.TEST_LOGIN_PASSWORD }}
+          NEW_VPS_USERNAME: ${{ secrets.NEW_VPS_USERNAME }}
+          NEW_VPS_HOST: ${{ secrets.NEW_VPS_HOST }}
+
       # ---- Storybook preview (only when this PR touches stories/.storybook) ----
       # Runs inside the same approved-contributor-gated deploy job, so it deploys
       # under the exact same access rules as the app preview.
@@ -379,8 +393,9 @@ jobs:
         env:
           SB_URL: ${{ steps.storybook.outputs.url }}
           SB_FILES: ${{ steps.sb-changes.outputs.storybook_files }}
+          NEW_VPS_HOST: ${{ secrets.NEW_VPS_HOST }}
         with:
-          github-token: ${{ steps.setup-bot.outputs.token }}
+          github-token: ${{ github.token }}
           script: |
             const { owner, repo } = context.repo;
             const prNumber = ${{ needs.check-pr.outputs.pr_number }};
@@ -401,7 +416,7 @@ jobs:
               }
             }
 
-            const deploymentUrl = `http://${{ secrets.NEW_VPS_HOST }}:${v2Port}`;
+            const deploymentUrl = `http://${process.env.NEW_VPS_HOST}:${v2Port}`;
 
             // Only mention the portal when this image actually embeds it.
             // Use the direct IP URL - the SSL hostname isn't supported yet.
@@ -447,6 +462,7 @@ jobs:
             });
 
   cleanup-v2-deployment:
+    environment: pr-preview
     if: github.event.action == 'closed'
     runs-on: ubuntu-latest
     permissions:
@@ -463,19 +479,10 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
-      - name: Setup GitHub App Bot
-        if: github.actor != 'dependabot[bot]'
-        id: setup-bot
-        uses: ./.github/actions/setup-bot
-        continue-on-error: true
-        with:
-          app-id: ${{ secrets.GH_APP_ID }}
-          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
-
       - name: Clean up V2 deployment comments
         uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         with:
-          github-token: ${{ steps.setup-bot.outputs.token }}
+          github-token: ${{ github.token }}
           script: |
             const { owner, repo } = context.repo;
             const prNumber = ${{ github.event.pull_request.number }};
@@ -504,12 +511,14 @@ jobs:
       - name: Set up SSH
         run: |
           mkdir -p ~/.ssh/
-          echo "${{ secrets.NEW_VPS_SSH_KEY }}" > ../private.key
+          echo "${NEW_VPS_SSH_KEY}" > ../private.key
           sudo chmod 600 ../private.key
 
+        env:
+          NEW_VPS_SSH_KEY: ${{ secrets.NEW_VPS_SSH_KEY }}
       - name: Cleanup V2 deployment
         run: |
-          ssh -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -T ${{ secrets.NEW_VPS_USERNAME }}@${{ secrets.NEW_VPS_HOST }} << 'ENDSSH'
+          ssh -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -T ${NEW_VPS_USERNAME}@${NEW_VPS_HOST} << 'ENDSSH'
             if [ -d "/stirling/V2-PR-${{ github.event.pull_request.number }}" ]; then
               echo "Found V2 PR directory, proceeding with cleanup..."
 
@@ -542,6 +551,9 @@ jobs:
             # Only remove PR-specific containers and directories
           ENDSSH
 
+        env:
+          NEW_VPS_USERNAME: ${{ secrets.NEW_VPS_USERNAME }}
+          NEW_VPS_HOST: ${{ secrets.NEW_VPS_HOST }}
       - name: Cleanup temporary files
         if: always()
         run: |
diff --git a/.github/workflows/PR-Demo-Comment-with-react.yml b/.github/workflows/PR-Demo-Comment-with-react.yml
index c804489836..8e0e66032e 100644
--- a/.github/workflows/PR-Demo-Comment-with-react.yml
+++ b/.github/workflows/PR-Demo-Comment-with-react.yml
@@ -37,7 +37,8 @@ jobs:
   check-comment:
     runs-on: ubuntu-latest
     permissions:
-      issues: write
+      contents: read # actions/checkout
+      issues: write # add reaction to the triggering issue comment
     if: |
       vars.CI_PROFILE != 'lite' && (
         github.event_name == 'workflow_dispatch' ||
@@ -76,15 +77,6 @@ jobs:
       - name: Checkout PR
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
-      - name: Setup GitHub App Bot
-        if: github.actor != 'dependabot[bot]'
-        id: setup-bot
-        uses: ./.github/actions/setup-bot
-        continue-on-error: true
-        with:
-          app-id: ${{ secrets.GH_APP_ID }}
-          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
-
       - name: Get PR data
         id: get-pr
         uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
@@ -155,7 +147,7 @@ jobs:
         id: add-eyes-reaction
         uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         with:
-          github-token: ${{ steps.setup-bot.outputs.token }}
+          github-token: ${{ github.token }}
           script: |
             console.log(`Adding eyes reaction to comment ID: ${context.payload.comment.id}`);
             try {
@@ -174,11 +166,14 @@ jobs:
             }
 
   deploy-pr:
+    environment: pr-preview
     needs: check-comment
     runs-on: ubuntu-latest
     permissions:
-      issues: write
+      contents: read # actions/checkout, incl. the PR merge ref
+      issues: write # reactions, 'pr-deployed' label, deployment URL comment
       pull-requests: write
+      packages: write # push PR image to ghcr.io
 
     steps:
       - name: Harden Runner
@@ -189,20 +184,12 @@ jobs:
       - name: Checkout PR
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
-      - name: Setup GitHub App Bot
-        if: github.actor != 'dependabot[bot]'
-        id: setup-bot
-        uses: ./.github/actions/setup-bot
-        continue-on-error: true
-        with:
-          app-id: ${{ secrets.GH_APP_ID }}
-          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
-
       - name: Checkout PR
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           ref: refs/pull/${{ needs.check-comment.outputs.pr_number }}/merge
-          token: ${{ steps.setup-bot.outputs.token }}
+          # untrusted tree gets built below - never leave credentials in .git/config
+          persist-credentials: false
 
       - name: Set up JDK 25
         uses: actions/setup-java@b6effb05e454b25005698d916606bdc6ffcbf961 # v5.7.0
@@ -240,11 +227,16 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@bb05f3f5519dd87d3ba754cc423b652a5edd6d2c # v4.2.0
 
-      - name: Login to Docker Hub
+      - name: Login to GitHub Container Registry
         uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4.6.0
         with:
-          username: ${{ secrets.DOCKER_HUB_USERNAME }}
-          password: ${{ secrets.DOCKER_HUB_API }}
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ github.token }}
+
+      - name: Convert repository owner to lowercase
+        id: repoowner
+        run: echo "lowercase=$(echo ${{ github.repository_owner }} | awk '{print tolower($0)}')" >> $GITHUB_OUTPUT
 
       - name: Build and push PR-specific image
         uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7.3.0
@@ -254,7 +246,7 @@ jobs:
           push: true
           cache-from: type=gha,scope=stirling-pdf-latest
           cache-to: type=gha,mode=max,scope=stirling-pdf-latest
-          tags: ${{ secrets.DOCKER_HUB_USERNAME }}/test:pr-${{ needs.check-comment.outputs.pr_number }}
+          tags: ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test:pr-${{ needs.check-comment.outputs.pr_number }}
           build-args: |
             VERSION_TAG=alpha
             PROTOTYPES_BUILD=${{ needs.check-comment.outputs.enable_prototypes }}
@@ -269,15 +261,17 @@ jobs:
           push: true
           cache-from: type=gha,scope=stirling-pdf-engine
           cache-to: type=gha,mode=max,scope=stirling-pdf-engine
-          tags: ${{ secrets.DOCKER_HUB_USERNAME }}/test:engine-pr-${{ needs.check-comment.outputs.pr_number }}
+          tags: ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test:engine-pr-${{ needs.check-comment.outputs.pr_number }}
           platforms: linux/amd64
 
       - name: Set up SSH
         run: |
           mkdir -p ~/.ssh/
-          echo "${{ secrets.NEW_VPS_SSH_KEY }}" > ../private.key
+          echo "${NEW_VPS_SSH_KEY}" > ../private.key
           sudo chmod 600 ../private.key
 
+        env:
+          NEW_VPS_SSH_KEY: ${{ secrets.NEW_VPS_SSH_KEY }}
       - name: Deploy to VPS
         id: deploy
         run: |
@@ -295,11 +289,11 @@ jobs:
           # Set pro/enterprise settings (enterprise implies pro)
           if [ "${{ needs.check-comment.outputs.enable_enterprise }}" == "true" ]; then
             PREMIUM_ENABLED="true"
-            PREMIUM_KEY="${{ secrets.ENTERPRISE_KEY }}"
+            PREMIUM_KEY="${ENTERPRISE_KEY}"
             PREMIUM_PROFEATURES_AUDIT_ENABLED="true"
           elif [ "${{ needs.check-comment.outputs.enable_pro }}" == "true" ]; then
             PREMIUM_ENABLED="true"
-            PREMIUM_KEY="${{ secrets.PREMIUM_KEY }}"
+            PREMIUM_KEY="${PRO_KEY}"
             PREMIUM_PROFEATURES_AUDIT_ENABLED="true"
           else
             PREMIUM_ENABLED="false"
@@ -309,7 +303,6 @@ jobs:
 
           ENABLE_PROTOTYPES="${{ needs.check-comment.outputs.enable_prototypes }}"
           PR_NUMBER="${{ needs.check-comment.outputs.pr_number }}"
-          DOCKER_USER="${{ secrets.DOCKER_HUB_USERNAME }}"
 
           # Build engine env vars for backend (only set when prototypes enabled)
           if [ "$ENABLE_PROTOTYPES" == "true" ]; then
@@ -319,9 +312,9 @@ jobs:
             ENGINE_SERVICE="
             stirling-pdf-engine:
               container_name: stirling-pdf-engine-pr-${PR_NUMBER}
-              image: ${DOCKER_USER}/test:engine-pr-${PR_NUMBER}
+              image: ${IMAGE_BASE}:engine-pr-${PR_NUMBER}
               environment:
-                ANTHROPIC_API_KEY: \"${{ secrets.ANTHROPIC_API_KEY }}\"
+                ANTHROPIC_API_KEY: \"${ANTHROPIC_API_KEY}\"
               networks:
                 - pr-network
               restart: on-failure:5"
@@ -344,7 +337,7 @@ jobs:
           services:
             stirling-pdf:
               container_name: stirling-pdf-pr-${PR_NUMBER}
-              image: ${DOCKER_USER}/test:pr-${PR_NUMBER}
+              image: ${IMAGE_BASE}:pr-${PR_NUMBER}
               ports:
                 - "${PR_NUMBER}:8080"
               volumes:
@@ -368,9 +361,9 @@ jobs:
           EOF
 
           # Then copy the file and execute commands
-          scp -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null docker-compose.yml ${{ secrets.NEW_VPS_USERNAME }}@${{ secrets.NEW_VPS_HOST }}:/tmp/docker-compose.yml
+          scp -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null docker-compose.yml ${NEW_VPS_USERNAME}@${NEW_VPS_HOST}:/tmp/docker-compose.yml
 
-          ssh -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -T ${{ secrets.NEW_VPS_USERNAME }}@${{ secrets.NEW_VPS_HOST }} << ENDSSH
+          ssh -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -T ${NEW_VPS_USERNAME}@${NEW_VPS_HOST} << ENDSSH
             # Create PR-specific directories
             mkdir -p /stirling/PR-${PR_NUMBER}/{data,config,logs}
 
@@ -386,11 +379,19 @@ jobs:
           # Set output for use in PR comment
           echo "security_status=${SECURITY_STATUS}" >> $GITHUB_ENV
 
+        env:
+          ENTERPRISE_KEY: ${{ secrets.ENTERPRISE_KEY }}
+          # named PRO_KEY, not PREMIUM_KEY, so the shell var it feeds is not self-referential
+          PRO_KEY: ${{ secrets.PREMIUM_KEY }}
+          ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
+          IMAGE_BASE: ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test
+          NEW_VPS_USERNAME: ${{ secrets.NEW_VPS_USERNAME }}
+          NEW_VPS_HOST: ${{ secrets.NEW_VPS_HOST }}
       - name: Add success reaction to comment
         if: success() && github.event_name == 'issue_comment'
         uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         with:
-          github-token: ${{ steps.setup-bot.outputs.token }}
+          github-token: ${{ github.token }}
           script: |
             console.log(`Adding rocket reaction to comment ID: ${{ needs.check-comment.outputs.comment_id }}`);
             try {
@@ -425,7 +426,7 @@ jobs:
         if: failure() && github.event_name == 'issue_comment'
         uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         with:
-          github-token: ${{ steps.setup-bot.outputs.token }}
+          github-token: ${{ github.token }}
           script: |
             console.log(`Adding -1 reaction to comment ID: ${{ needs.check-comment.outputs.comment_id }}`);
             try {
@@ -444,15 +445,17 @@ jobs:
       - name: Post deployment URL to PR
         if: success()
         uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        env:
+          NEW_VPS_HOST: ${{ secrets.NEW_VPS_HOST }}
         with:
-          github-token: ${{ steps.setup-bot.outputs.token }}
+          github-token: ${{ github.token }}
           script: |
             const { GITHUB_REPOSITORY } = process.env;
             const [repoOwner, repoName] = GITHUB_REPOSITORY.split('/');
             const prNumber = ${{ needs.check-comment.outputs.pr_number }};
             const securityStatus = process.env.security_status || "Security Disabled";
 
-            const deploymentUrl = `http://${{ secrets.NEW_VPS_HOST }}:${prNumber}`;
+            const deploymentUrl = `http://${process.env.NEW_VPS_HOST}:${prNumber}`;
             const commentBody = `## 🚀 PR Test Deployment\n\n` +
                               `Your PR has been deployed for testing!\n\n` +
                               `🔗 **Test URL:** [${deploymentUrl}](${deploymentUrl})\n` +
@@ -477,6 +480,9 @@ jobs:
   handle-label-commands:
     if: ${{ github.event.issue.pull_request != null }}
     runs-on: ubuntu-latest
+    permissions:
+      contents: read # actions/checkout, reads repo_devs.json and labels.yml
+      issues: write # add/remove labels, delete the command comment
     steps:
       - name: Harden Runner
         uses: step-security/harden-runner@bf7454d06d71f1098171f2acdf0cd4708d7b5920 # v2.20.0
@@ -486,17 +492,10 @@ jobs:
       - name: Check out the repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
-      - name: Setup GitHub App Bot
-        id: setup-bot
-        uses: ./.github/actions/setup-bot
-        with:
-          app-id: ${{ secrets.GH_APP_ID }}
-          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
-
       - name: Apply label commands
         uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         with:
-          github-token: ${{ steps.setup-bot.outputs.token }}
+          github-token: ${{ github.token }}
           script: |
             const fs = require('fs');
             const path = require('path');
diff --git a/.github/workflows/PR-Demo-cleanup.yml b/.github/workflows/PR-Demo-cleanup.yml
index 146f5c7f78..7b4ee8b3a3 100644
--- a/.github/workflows/PR-Demo-cleanup.yml
+++ b/.github/workflows/PR-Demo-cleanup.yml
@@ -13,11 +13,13 @@ env:
 
 jobs:
   cleanup:
+    environment: pr-preview
     if: github.event.action == 'closed'
     runs-on: ubuntu-latest
     permissions:
+      contents: read # actions/checkout
       pull-requests: write
-      issues: write
+      issues: write # list/remove labels, list/delete comments
 
     steps:
       - name: Harden Runner
@@ -28,20 +30,11 @@ jobs:
       - name: Checkout PR
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
-      - name: Setup GitHub App Bot
-        if: github.actor != 'dependabot[bot]'
-        id: setup-bot
-        uses: ./.github/actions/setup-bot
-        continue-on-error: true
-        with:
-          app-id: ${{ secrets.GH_APP_ID }}
-          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
-
       - name: Remove 'pr-deployed' label if present
         id: remove-label-comment
         uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         with:
-          github-token: ${{ steps.setup-bot.outputs.token }}
+          github-token: ${{ github.token }}
           script: |
             const prNumber = ${{ github.event.pull_request.number }};
             const owner = context.repo.owner;
@@ -100,14 +93,22 @@ jobs:
         if: steps.remove-label-comment.outputs.present == 'true'
         run: |
           mkdir -p ~/.ssh/
-          echo "${{ secrets.NEW_VPS_SSH_KEY }}" > ../private.key
+          echo "${NEW_VPS_SSH_KEY}" > ../private.key
           sudo chmod 600 ../private.key
+        env:
+          NEW_VPS_SSH_KEY: ${{ secrets.NEW_VPS_SSH_KEY }}
+
+      - name: Convert repository owner to lowercase
+        id: repoowner
+        run: echo "lowercase=$(echo ${{ github.repository_owner }} | awk '{print tolower($0)}')" >> $GITHUB_OUTPUT
 
       - name: Cleanup PR deployment
         if: steps.remove-label-comment.outputs.present == 'true'
         id: cleanup
+        # ENDSSH heredoc is quoted, so its body is sent literally: secrets inside it
+        # must stay as GitHub expressions, a shell var would be empty on the remote host.
         run: |
-          ssh -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -T ${{ secrets.NEW_VPS_USERNAME }}@${{ secrets.NEW_VPS_HOST }} << 'ENDSSH'
+          ssh -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -T ${NEW_VPS_USERNAME}@${NEW_VPS_HOST} << 'ENDSSH'
             if [ -d "/stirling/PR-${{ github.event.pull_request.number }}" ]; then
               echo "Found PR directory, proceeding with cleanup..."
 
@@ -122,8 +123,8 @@ jobs:
               rm -rf /stirling/PR-${{ github.event.pull_request.number }}
 
               # Remove the Docker images
-              docker rmi --no-prune ${{ secrets.DOCKER_HUB_USERNAME }}/test:pr-${{ github.event.pull_request.number }} || true
-              docker rmi --no-prune ${{ secrets.DOCKER_HUB_USERNAME }}/test:engine-pr-${{ github.event.pull_request.number }} || true
+              docker rmi --no-prune ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test:pr-${{ github.event.pull_request.number }} || true
+              docker rmi --no-prune ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test:engine-pr-${{ github.event.pull_request.number }} || true
 
               echo "PERFORMED_CLEANUP"
             else
@@ -131,6 +132,9 @@ jobs:
               echo "NO_CLEANUP_NEEDED"
             fi
           ENDSSH
+        env:
+          NEW_VPS_USERNAME: ${{ secrets.NEW_VPS_USERNAME }}
+          NEW_VPS_HOST: ${{ secrets.NEW_VPS_HOST }}
 
       - name: Cleanup temporary files
         if: always()
diff --git a/.github/workflows/ai_pr_title_review.yml b/.github/workflows/ai_pr_title_review.yml
index 563e94c9b3..9922177b4b 100644
--- a/.github/workflows/ai_pr_title_review.yml
+++ b/.github/workflows/ai_pr_title_review.yml
@@ -10,10 +10,12 @@ permissions: # required for secure-repo hardening
 
 jobs:
   ai-title-review:
+    # GITHUB_TOKEN obeys this block, so it must cover every API call made below.
     permissions:
-      contents: read
-      pull-requests: write
-      models: read
+      contents: read # actions/checkout, git fetch/diff
+      issues: write # issues.listComments / createComment / updateComment on the PR
+      pull-requests: write # same endpoints when the target is a pull request
+      models: read # actions/ai-inference
 
     runs-on: ubuntu-latest
 
@@ -30,15 +32,6 @@ jobs:
       - name: Configure Git to suppress detached HEAD warning
         run: git config --global advice.detachedHead false
 
-      - name: Setup GitHub App Bot
-        if: github.actor != 'dependabot[bot]'
-        id: setup-bot
-        uses: ./.github/actions/setup-bot
-        continue-on-error: true
-        with:
-          app-id: ${{ secrets.GH_APP_ID }}
-          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
-
       - name: Check if actor is repo developer
         id: actor
         run: |
@@ -161,7 +154,7 @@ jobs:
         uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         continue-on-error: true
         with:
-          github-token: ${{ steps.setup-bot.outputs.token }}
+          github-token: ${{ github.token }}
           script: |
             const fs = require('fs');
             const body = fs.readFileSync('/tmp/ai-title-comment.md', 'utf8');
@@ -172,7 +165,7 @@ jobs:
             const ratingMatch = body.match(/\*\*PR-Title Rating\*\*: (\d+)\/10/);
             const rating = ratingMatch ? parseInt(ratingMatch[1], 10) : null;
 
-            const expectedActor = "${{ steps.setup-bot.outputs.app-slug }}[bot]";
+            const expectedActor = "github-actions[bot]";
             const comments = await github.rest.issues.listComments({ owner, repo, issue_number });
 
             const existing = comments.data.find(c =>
diff --git a/.github/workflows/aur-publish.yml b/.github/workflows/aur-publish.yml
index f5af23da07..f1ca2be8ca 100644
--- a/.github/workflows/aur-publish.yml
+++ b/.github/workflows/aur-publish.yml
@@ -66,6 +66,7 @@ jobs:
           echo "jar_sha256=$JAR_SHA" >> "$GITHUB_OUTPUT"
 
   publish-aur:
+    environment: package-publish
     needs: get-release-info
     runs-on: ubuntu-latest
     steps:
diff --git a/.github/workflows/auto-labelerV2.yml b/.github/workflows/auto-labelerV2.yml
index 6039c0e7df..bcbd0fcba5 100644
--- a/.github/workflows/auto-labelerV2.yml
+++ b/.github/workflows/auto-labelerV2.yml
@@ -13,7 +13,9 @@ jobs:
   labeler:
     runs-on: ubuntu-latest
     permissions:
-      pull-requests: write
+      contents: read # checkout + labeler fetching its config from the repo
+      pull-requests: write # read changed files, apply labels to the PR
+      issues: write # labels are applied through the issues API
     steps:
       - name: Harden Runner
         uses: step-security/harden-runner@bf7454d06d71f1098171f2acdf0cd4708d7b5920 # v2.20.0
@@ -22,17 +24,10 @@ jobs:
 
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
-      - name: Setup GitHub App Bot
-        id: setup-bot
-        uses: ./.github/actions/setup-bot
-        with:
-          app-id: ${{ secrets.GH_APP_ID }}
-          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
-
       - uses: srvaroa/labeler@bf262763a8a8e191f5847873aecc0f29df84f957 # v1.14.0
         with:
           config_path: .github/labeler-config-srvaroa.yml
           use_local_config: false
           fail_on_error: true
         env:
-          GITHUB_TOKEN: "${{ steps.setup-bot.outputs.token }}"
+          GITHUB_TOKEN: "${{ github.token }}"
diff --git a/.github/workflows/check_toml.yml b/.github/workflows/check_toml.yml
index d134c80a9b..eff416c379 100644
--- a/.github/workflows/check_toml.yml
+++ b/.github/workflows/check_toml.yml
@@ -23,6 +23,7 @@ jobs:
     if: github.event_name == 'pull_request_target'
     runs-on: ubuntu-latest
     permissions:
+      contents: read # Checkout, and read translation files via the contents API
       issues: write # Allow posting comments on issues/PRs
       pull-requests: write # Allow writing to pull requests
     steps:
@@ -34,18 +35,11 @@ jobs:
       - name: Checkout main branch first
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
-      - name: Setup GitHub App Bot
-        id: setup-bot
-        uses: ./.github/actions/setup-bot
-        with:
-          app-id: ${{ secrets.GH_APP_ID }}
-          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
-
       - name: Get PR data
         id: get-pr-data
         uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         with:
-          github-token: ${{ steps.setup-bot.outputs.token }}
+          github-token: ${{ github.token }}
           script: |
             const prNumber = context.payload.pull_request.number;
             const repoOwner = context.payload.repository.owner.login;
@@ -66,17 +60,18 @@ jobs:
       - name: Fetch PR changed files
         id: fetch-pr-changes
         env:
-          GH_TOKEN: ${{ steps.setup-bot.outputs.token }}
+          GH_TOKEN: ${{ github.token }}
+          PR_NUMBER: ${{ steps.get-pr-data.outputs.pr_number }}
         run: |
           echo "Fetching PR changed files..."
           echo "Getting list of changed files from PR..."
           # Check if PR number exists
-          if [ -z "${{ steps.get-pr-data.outputs.pr_number }}" ]; then
+          if [ -z "${PR_NUMBER}" ]; then
             echo "Error: PR number is empty"
             exit 1
           fi
           # Get changed files and filter for TOML translation files
-          gh pr view ${{ steps.get-pr-data.outputs.pr_number }} --json files -q ".files[].path" | grep -E '^frontend/editor/public/locales/[a-zA-Z-]+/translation\.toml$' > changed_files.txt || echo "No matching TOML files found in PR"
+          gh pr view "${PR_NUMBER}" --json files -q ".files[].path" | grep -E '^frontend/editor/public/locales/[a-zA-Z-]+/translation\.toml$' > changed_files.txt || echo "No matching TOML files found in PR"
           # Check if any files were found
           if [ ! -s changed_files.txt ]; then
             echo "No TOML translation files changed in this PR"
@@ -88,32 +83,36 @@ jobs:
       - name: Determine reference file
         id: determine-file
         uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        env:
+          # Untrusted, fork-controlled values are passed via env, never interpolated into the script
+          PR_NUMBER: ${{ steps.get-pr-data.outputs.pr_number }}
+          REPO_OWNER: ${{ steps.get-pr-data.outputs.repo_owner }}
+          REPO_NAME: ${{ steps.get-pr-data.outputs.repo_name }}
+          PR_REPO_OWNER: ${{ github.event.pull_request.head.repo.owner.login }}
+          PR_REPO_NAME: ${{ github.event.pull_request.head.repo.name }}
+          PR_BRANCH: ${{ steps.get-pr-data.outputs.branch }}
         with:
-          github-token: ${{ steps.setup-bot.outputs.token }}
+          github-token: ${{ github.token }}
           script: |
             const fs = require("fs");
             const path = require("path");
 
-            const prNumber = ${{ steps.get-pr-data.outputs.pr_number }};
-            const repoOwner = "${{ steps.get-pr-data.outputs.repo_owner }}";
-            const repoName = "${{ steps.get-pr-data.outputs.repo_name }}";
-
-            const prRepoOwner = "${{ github.event.pull_request.head.repo.owner.login }}";
-            const prRepoName = "${{ github.event.pull_request.head.repo.name }}";
-            const branch = "${{ steps.get-pr-data.outputs.branch }}";
-
-            console.log(`Determining reference file for PR #${prNumber}`);
-
-            // Validate inputs
+            // Validate inputs before any use
             const validateInput = (input, regex, name) => {
-              if (!regex.test(input)) {
+              if (typeof input !== "string" || !regex.test(input)) {
                 throw new Error(`Invalid ${name}: ${input}`);
               }
+              return input;
             };
 
-            validateInput(repoOwner, /^[a-zA-Z0-9_-]+$/, "repository owner");
-            validateInput(repoName, /^[a-zA-Z0-9._-]+$/, "repository name");
-            validateInput(branch, /^[a-zA-Z0-9._/-]+$/, "branch name");
+            const repoOwner = validateInput(process.env.REPO_OWNER, /^[a-zA-Z0-9_-]+$/, "repository owner");
+            const repoName = validateInput(process.env.REPO_NAME, /^[a-zA-Z0-9._-]+$/, "repository name");
+            const prRepoOwner = validateInput(process.env.PR_REPO_OWNER, /^[a-zA-Z0-9_-]+$/, "PR repository owner");
+            const prRepoName = validateInput(process.env.PR_REPO_NAME, /^[a-zA-Z0-9._-]+$/, "PR repository name");
+            const branch = validateInput(process.env.PR_BRANCH, /^[a-zA-Z0-9._/-]+$/, "branch name");
+            const prNumber = Number(validateInput(process.env.PR_NUMBER, /^[0-9]+$/, "PR number"));
+
+            console.log(`Determining reference file for PR #${prNumber}`);
 
             // Get the list of changed files in the PR
             const { data: files } = await github.rest.pulls.listFiles({
@@ -209,10 +208,12 @@ jobs:
 
       - name: Run Python script to check files
         id: run-check
+        env:
+          PR_ACTOR: ${{ github.event.pull_request.user.login }}
         run: |
           echo "Running Python script to check TOML files..."
           uv run --project engine --locked --group tools python .github/scripts/check_language_toml.py \
-            --actor ${{ github.event.pull_request.user.login }} \
+            --actor "${PR_ACTOR}" \
             --reference-file "${REFERENCE_FILE}" \
             --branch "pr-branch" \
             --files "${FILES_LIST[@]}" > result.txt
@@ -245,7 +246,7 @@ jobs:
         if: env.SCRIPT_OUTPUT != ''
         uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         with:
-          github-token: ${{ steps.setup-bot.outputs.token }}
+          github-token: ${{ github.token }}
           script: |
             const { GITHUB_REPOSITORY, SCRIPT_OUTPUT } = process.env;
             const [repoOwner, repoName] = GITHUB_REPOSITORY.split('/');
@@ -261,7 +262,7 @@ jobs:
             const comment = comments.data.find(c => c.body.includes("## 🌐 TOML Translation Verification Summary"));
 
             // Only update or create comments by the action user
-            const expectedActor = "${{ steps.setup-bot.outputs.app-slug }}[bot]";
+            const expectedActor = "github-actions[bot]";
 
             if (comment && comment.user.login === expectedActor) {
               // Update existing comment
diff --git a/.github/workflows/deploy-on-v2-commit.yml b/.github/workflows/deploy-on-v2-commit.yml
index c98ec8641c..21d12044f5 100644
--- a/.github/workflows/deploy-on-v2-commit.yml
+++ b/.github/workflows/deploy-on-v2-commit.yml
@@ -11,7 +11,11 @@ permissions:
 
 jobs:
   deploy-v2-on-push:
+    environment: pr-preview
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
     concurrency:
       group: deploy-v2-push-V2
       cancel-in-progress: true
@@ -62,10 +66,21 @@ jobs:
             echo "backend_short=${BACKEND_HASH:0:8}" >> $GITHUB_OUTPUT
           fi
 
+      - name: Convert repository owner to lowercase
+        id: repoowner
+        run: echo "lowercase=$(echo ${{ github.repository_owner }} | awk '{print tolower($0)}')" >> $GITHUB_OUTPUT
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4.6.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ github.token }}
+
       - name: Check if frontend image exists
         id: check-frontend
         run: |
-          if docker manifest inspect ${{ secrets.DOCKER_HUB_USERNAME }}/test:v2-frontend-${{ steps.commit-hashes.outputs.frontend_short }} >/dev/null 2>&1; then
+          if docker manifest inspect ${IMAGE_BASE}:v2-frontend-${{ steps.commit-hashes.outputs.frontend_short }} >/dev/null 2>&1; then
             echo "exists=true" >> $GITHUB_OUTPUT
             echo "Frontend image already exists, skipping build"
           else
@@ -73,10 +88,12 @@ jobs:
             echo "Frontend image needs to be built"
           fi
 
+        env:
+          IMAGE_BASE: ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test
       - name: Check if backend image exists
         id: check-backend
         run: |
-          if docker manifest inspect ${{ secrets.DOCKER_HUB_USERNAME }}/test:v2-backend-${{ steps.commit-hashes.outputs.backend_short }} >/dev/null 2>&1; then
+          if docker manifest inspect ${IMAGE_BASE}:v2-backend-${{ steps.commit-hashes.outputs.backend_short }} >/dev/null 2>&1; then
             echo "exists=true" >> $GITHUB_OUTPUT
             echo "Backend image already exists, skipping build"
           else
@@ -84,11 +101,8 @@ jobs:
             echo "Backend image needs to be built"
           fi
 
-      - name: Login to Docker Hub
-        uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4.6.0
-        with:
-          username: ${{ secrets.DOCKER_HUB_USERNAME }}
-          password: ${{ secrets.DOCKER_HUB_API }}
+        env:
+          IMAGE_BASE: ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test
 
       - name: Build and push frontend image
         if: steps.check-frontend.outputs.exists == 'false'
@@ -100,8 +114,8 @@ jobs:
           cache-from: type=gha,scope=stirling-v2-frontend
           cache-to: type=gha,mode=max,scope=stirling-v2-frontend
           tags: |
-            ${{ secrets.DOCKER_HUB_USERNAME }}/test:v2-frontend-${{ steps.commit-hashes.outputs.frontend_short }}
-            ${{ secrets.DOCKER_HUB_USERNAME }}/test:v2-frontend-latest
+            ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test:v2-frontend-${{ steps.commit-hashes.outputs.frontend_short }}
+            ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test:v2-frontend-latest
           build-args: VERSION_TAG=v2-alpha
           platforms: linux/amd64
 
@@ -115,17 +129,19 @@ jobs:
           cache-from: type=gha,scope=stirling-v2-backend
           cache-to: type=gha,mode=max,scope=stirling-v2-backend
           tags: |
-            ${{ secrets.DOCKER_HUB_USERNAME }}/test:v2-backend-${{ steps.commit-hashes.outputs.backend_short }}
-            ${{ secrets.DOCKER_HUB_USERNAME }}/test:v2-backend-latest
+            ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test:v2-backend-${{ steps.commit-hashes.outputs.backend_short }}
+            ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test:v2-backend-latest
           build-args: VERSION_TAG=v2-alpha
           platforms: linux/amd64
 
       - name: Set up SSH
         run: |
           mkdir -p ~/.ssh/
-          echo "${{ secrets.NEW_VPS_SSH_KEY }}" > ../private.key
+          echo "${NEW_VPS_SSH_KEY}" > ../private.key
           chmod 600 ../private.key
 
+        env:
+          NEW_VPS_SSH_KEY: ${{ secrets.NEW_VPS_SSH_KEY }}
       - name: Deploy to VPS on port 3000
         run: |
           export UNIQUE_NAME=docker-compose-v2-$GITHUB_RUN_ID.yml
@@ -135,7 +151,7 @@ jobs:
           services:
             backend:
               container_name: stirling-v2-backend
-              image: ${{ secrets.DOCKER_HUB_USERNAME }}/test:v2-backend-${{ steps.commit-hashes.outputs.backend_short }}
+              image: ${IMAGE_BASE}:v2-backend-${{ steps.commit-hashes.outputs.backend_short }}
               ports:
                 - "13000:8080"
               volumes:
@@ -158,21 +174,21 @@ jobs:
 
             frontend:
               container_name: stirling-v2-frontend
-              image: ${{ secrets.DOCKER_HUB_USERNAME }}/test:v2-frontend-${{ steps.commit-hashes.outputs.frontend_short }}
+              image: ${IMAGE_BASE}:v2-frontend-${{ steps.commit-hashes.outputs.frontend_short }}
               ports:
                 - "3000:80"
               environment:
-                VITE_API_BASE_URL: "http://${{ secrets.NEW_VPS_HOST }}:13000"
+                VITE_API_BASE_URL: "http://${NEW_VPS_HOST}:13000"
               depends_on:
                 - backend
               restart: on-failure:5
           EOF
 
           # Copy to remote with unique name
-          scp -i ../private.key -o StrictHostKeyChecking=no $UNIQUE_NAME ${{ secrets.NEW_VPS_USERNAME }}@${{ secrets.NEW_VPS_HOST }}:/tmp/$UNIQUE_NAME
+          scp -i ../private.key -o StrictHostKeyChecking=no $UNIQUE_NAME ${NEW_VPS_USERNAME}@${NEW_VPS_HOST}:/tmp/$UNIQUE_NAME
 
           # SSH and rename/move atomically to avoid interference
-          ssh -i ../private.key -o StrictHostKeyChecking=no ${{ secrets.NEW_VPS_USERNAME }}@${{ secrets.NEW_VPS_HOST }} << ENDSSH
+          ssh -i ../private.key -o StrictHostKeyChecking=no ${NEW_VPS_USERNAME}@${NEW_VPS_HOST} << ENDSSH
             mkdir -p /stirling/V2/{data,config,logs}
             mv /tmp/$UNIQUE_NAME /stirling/V2/docker-compose.yml
             cd /stirling/V2
@@ -183,6 +199,10 @@ jobs:
             docker image prune -af --filter "until=336h" --filter "label!=keep=true" || true
           ENDSSH
 
+        env:
+          IMAGE_BASE: ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test
+          NEW_VPS_HOST: ${{ secrets.NEW_VPS_HOST }}
+          NEW_VPS_USERNAME: ${{ secrets.NEW_VPS_USERNAME }}
       - name: Cleanup temporary files
         if: always()
         run: |
diff --git a/.github/workflows/multiOSReleases.yml b/.github/workflows/multiOSReleases.yml
index f02e6c612c..c712467e7b 100644
--- a/.github/workflows/multiOSReleases.yml
+++ b/.github/workflows/multiOSReleases.yml
@@ -93,7 +93,7 @@ jobs:
           ALL="$WINDOWS,$WINDOWS_ARM64,$MACOS,$LINUX"
 
           if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
-            case "${{ github.event.inputs.platform }}" in
+            case "${INPUT_PLATFORM}" in
               "windows")
                 echo "matrix={\"include\":[$WINDOWS,$WINDOWS_ARM64]}" >> $GITHUB_OUTPUT
                 ;;
@@ -115,6 +115,8 @@ jobs:
             echo "matrix={\"include\":[$ALL]}" >> $GITHUB_OUTPUT
           fi
 
+        env:
+          INPUT_PLATFORM: ${{ github.event.inputs.platform }}
   build-jars:
     needs: determine-matrix
     runs-on: ubuntu-latest
@@ -194,6 +196,7 @@ jobs:
           retention-days: 1
 
   build:
+    environment: release-signing
     needs: determine-matrix
     strategy:
       fail-fast: false
@@ -308,16 +311,16 @@ jobs:
           Write-Host "Setting up DigiCert KeyLocker environment..."
 
           # Decode client certificate
-          $certBytes = [Convert]::FromBase64String("${{ secrets.SM_CLIENT_CERT_FILE_B64 }}")
+          $certBytes = [Convert]::FromBase64String("$env:SM_CLIENT_CERT_FILE_B64")
           $certPath = "D:\Certificate_pkcs12.p12"
           [IO.File]::WriteAllBytes($certPath, $certBytes)
 
           # Set environment variables
           echo "SM_CLIENT_CERT_FILE=D:\Certificate_pkcs12.p12" >> $env:GITHUB_ENV
-          echo "SM_HOST=${{ secrets.SM_HOST }}" >> $env:GITHUB_ENV
-          echo "SM_API_KEY=${{ secrets.SM_API_KEY }}" >> $env:GITHUB_ENV
-          echo "SM_CLIENT_CERT_PASSWORD=${{ secrets.SM_CLIENT_CERT_PASSWORD }}" >> $env:GITHUB_ENV
-          echo "SM_KEYPAIR_ALIAS=${{ secrets.SM_KEYPAIR_ALIAS }}" >> $env:GITHUB_ENV
+          echo "SM_HOST=$env:SM_HOST" >> $env:GITHUB_ENV
+          echo "SM_API_KEY=$env:SM_API_KEY" >> $env:GITHUB_ENV
+          echo "SM_CLIENT_CERT_PASSWORD=$env:SM_CLIENT_CERT_PASSWORD" >> $env:GITHUB_ENV
+          echo "SM_KEYPAIR_ALIAS=$env:SM_KEYPAIR_ALIAS" >> $env:GITHUB_ENV
 
           # Get PKCS11 config path from DigiCert action
           $pkcs11Config = $env:PKCS11_CONFIG
@@ -335,6 +338,12 @@ jobs:
             }
           }
 
+        env:
+          SM_CLIENT_CERT_FILE_B64: ${{ secrets.SM_CLIENT_CERT_FILE_B64 }}
+          SM_HOST: ${{ secrets.SM_HOST }}
+          SM_API_KEY: ${{ secrets.SM_API_KEY }}
+          SM_CLIENT_CERT_PASSWORD: ${{ secrets.SM_CLIENT_CERT_PASSWORD }}
+          SM_KEYPAIR_ALIAS: ${{ secrets.SM_KEYPAIR_ALIAS }}
       # Traditional PFX Certificate Import (fallback if KeyLocker not configured)
       - name: Import Windows Code Signing Certificate
         if: ${{ startsWith(matrix.platform, 'windows') && env.SM_API_KEY == '' && (github.event_name == 'release' || (github.event_name == 'workflow_dispatch' && github.event.inputs.sign != 'false') || github.ref == 'refs/heads/V2-master') }}
diff --git a/.github/workflows/package-managers.yml b/.github/workflows/package-managers.yml
index e88c5e400e..751b3c1877 100644
--- a/.github/workflows/package-managers.yml
+++ b/.github/workflows/package-managers.yml
@@ -73,6 +73,7 @@ jobs:
           echo "jar_sha256=$JAR_SHA" >> "$GITHUB_OUTPUT"
 
   update-homebrew-and-scoop:
+    environment: package-publish
     needs: get-release-info
     runs-on: ubuntu-latest
     permissions:
diff --git a/.github/workflows/pr-conflict-labeler.yml b/.github/workflows/pr-conflict-labeler.yml
index a44d4f7b28..362421d0f8 100644
--- a/.github/workflows/pr-conflict-labeler.yml
+++ b/.github/workflows/pr-conflict-labeler.yml
@@ -27,9 +27,9 @@ jobs:
     name: Label conflicted PRs
     runs-on: ubuntu-latest
     permissions:
-      contents: read
-      issues: write
-      pull-requests: read
+      contents: read # actions/checkout
+      issues: write # get/create the repo-level conflict label
+      pull-requests: write # pulls.get/list plus add/remove the label on PRs
     steps:
       - name: Harden Runner
         uses: step-security/harden-runner@bf7454d06d71f1098171f2acdf0cd4708d7b5920 # v2.20.0
@@ -39,17 +39,10 @@ jobs:
       - name: Check out the repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
-      - name: Set up stirling-bot token
-        id: setup-bot
-        uses: ./.github/actions/setup-bot
-        with:
-          app-id: ${{ secrets.GH_APP_ID }}
-          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
-
       - name: Apply conflict label
         uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         with:
-          github-token: ${{ steps.setup-bot.outputs.token }}
+          github-token: ${{ github.token }}
           script: |
             const conflictLabel = process.env.CONFLICT_LABEL;
             const owner = context.repo.owner;
diff --git a/.github/workflows/push-docker-base.yml b/.github/workflows/push-docker-base.yml
index 167b71531e..f7dd1bcab4 100644
--- a/.github/workflows/push-docker-base.yml
+++ b/.github/workflows/push-docker-base.yml
@@ -32,9 +32,11 @@ jobs:
 
       - name: Set version
         id: version
+        env:
+          INPUT_VERSION: ${{ github.event.inputs.version }}
         run: |
           if [ "${{ github.event_name }}" == "workflow_dispatch" ]; then
-            VERSION="${{ github.event.inputs.version }}"
+            VERSION="${INPUT_VERSION}"
           elif [ "${{ github.ref_name }}" == "accessIssueFix" ]; then
             VERSION="1.0.3"
           else
diff --git a/.github/workflows/push-docker.yml b/.github/workflows/push-docker.yml
index 906884aaab..c9caf1b2f2 100644
--- a/.github/workflows/push-docker.yml
+++ b/.github/workflows/push-docker.yml
@@ -23,7 +23,6 @@ on:
       - master
       - main
       - V2-master
-      - testMain
 
 # cancel in-progress jobs if a new job is triggered
 # This is useful to avoid running multiple builds for the same branch if a new commit is pushed
@@ -42,6 +41,7 @@ permissions:
 
 jobs:
   push:
+    environment: docker-publish
     if: ${{ vars.CI_PROFILE != 'lite' }}
     runs-on: ubuntu-24.04-8core
     permissions:
diff --git a/.github/workflows/rollback-latest.yml b/.github/workflows/rollback-latest.yml
index 27141eff31..442a6f499e 100644
--- a/.github/workflows/rollback-latest.yml
+++ b/.github/workflows/rollback-latest.yml
@@ -13,6 +13,7 @@ permissions:
 
 jobs:
   rollback:
+    environment: docker-publish
     runs-on: ubuntu-latest
     permissions:
       packages: write
diff --git a/.github/workflows/sync-portal-docs.yml b/.github/workflows/sync-portal-docs.yml
index 0b27858d5f..5ff4f465c7 100644
--- a/.github/workflows/sync-portal-docs.yml
+++ b/.github/workflows/sync-portal-docs.yml
@@ -24,6 +24,7 @@ permissions:
 
 jobs:
   sync:
+    environment: bot-identity
     name: Sync docs manifest
     runs-on: ubuntu-latest
     timeout-minutes: 10
diff --git a/.github/workflows/sync_files_v2.yml b/.github/workflows/sync_files_v2.yml
index 1888c08ca7..7e6f999618 100644
--- a/.github/workflows/sync_files_v2.yml
+++ b/.github/workflows/sync_files_v2.yml
@@ -33,6 +33,7 @@ permissions:
 
 jobs:
   sync-files:
+    environment: bot-identity
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner
diff --git a/.github/workflows/tauri-build.yml b/.github/workflows/tauri-build.yml
index b0888d83cf..5c04f6009f 100644
--- a/.github/workflows/tauri-build.yml
+++ b/.github/workflows/tauri-build.yml
@@ -227,20 +227,26 @@ jobs:
       - name: Setup DigiCert KeyLocker Certificate
         if: ${{ inputs.sign && startsWith(matrix.platform, 'windows') && env.SM_API_KEY != '' && github.ref == 'refs/heads/main' }}
         shell: pwsh
+        env:
+          SM_CLIENT_CERT_FILE_B64: ${{ secrets.SM_CLIENT_CERT_FILE_B64 }}
+          SM_HOST: ${{ secrets.SM_HOST }}
+          SM_API_KEY: ${{ secrets.SM_API_KEY }}
+          SM_CLIENT_CERT_PASSWORD: ${{ secrets.SM_CLIENT_CERT_PASSWORD }}
+          SM_KEYPAIR_ALIAS: ${{ secrets.SM_KEYPAIR_ALIAS }}
         run: |
           Write-Host "Setting up DigiCert KeyLocker environment..."
 
           # Decode client certificate
-          $certBytes = [Convert]::FromBase64String("${{ secrets.SM_CLIENT_CERT_FILE_B64 }}")
+          $certBytes = [Convert]::FromBase64String("$env:SM_CLIENT_CERT_FILE_B64")
           $certPath = "D:\Certificate_pkcs12.p12"
           [IO.File]::WriteAllBytes($certPath, $certBytes)
 
           # Set environment variables
           echo "SM_CLIENT_CERT_FILE=D:\Certificate_pkcs12.p12" >> $env:GITHUB_ENV
-          echo "SM_HOST=${{ secrets.SM_HOST }}" >> $env:GITHUB_ENV
-          echo "SM_API_KEY=${{ secrets.SM_API_KEY }}" >> $env:GITHUB_ENV
-          echo "SM_CLIENT_CERT_PASSWORD=${{ secrets.SM_CLIENT_CERT_PASSWORD }}" >> $env:GITHUB_ENV
-          echo "SM_KEYPAIR_ALIAS=${{ secrets.SM_KEYPAIR_ALIAS }}" >> $env:GITHUB_ENV
+          echo "SM_HOST=$env:SM_HOST" >> $env:GITHUB_ENV
+          echo "SM_API_KEY=$env:SM_API_KEY" >> $env:GITHUB_ENV
+          echo "SM_CLIENT_CERT_PASSWORD=$env:SM_CLIENT_CERT_PASSWORD" >> $env:GITHUB_ENV
+          echo "SM_KEYPAIR_ALIAS=$env:SM_KEYPAIR_ALIAS" >> $env:GITHUB_ENV
 
           # Get PKCS11 config path from DigiCert action
           $pkcs11Config = $env:PKCS11_CONFIG
diff --git a/.github/workflows/testdriver.yml b/.github/workflows/testdriver.yml
index 7c03e57967..f98d874dfa 100644
--- a/.github/workflows/testdriver.yml
+++ b/.github/workflows/testdriver.yml
@@ -21,8 +21,12 @@ permissions:
 
 jobs:
   deploy:
+    environment: pr-preview
     if: ${{ vars.CI_PROFILE != 'lite' }}
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
     steps:
       - name: Harden Runner
         uses: step-security/harden-runner@bf7454d06d71f1098171f2acdf0cd4708d7b5920 # v2.20.0
@@ -66,11 +70,16 @@ jobs:
           VERSION=$(grep "^version =" build.gradle | awk -F'"' '{print $2}')
           echo "versionNumber=$VERSION" >> $GITHUB_OUTPUT
 
-      - name: Login to Docker Hub
+      - name: Convert repository owner to lowercase
+        id: repoowner
+        run: echo "lowercase=$(echo ${{ github.repository_owner }} | awk '{print tolower($0)}')" >> $GITHUB_OUTPUT
+
+      - name: Login to GitHub Container Registry
         uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4.6.0
         with:
-          username: ${{ secrets.DOCKER_HUB_USERNAME }}
-          password: ${{ secrets.DOCKER_HUB_API }}
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ github.token }}
 
       - name: Build and push test image
         uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7.3.0
@@ -80,16 +89,18 @@ jobs:
           push: true
           cache-from: type=gha,scope=stirling-pdf-latest
           cache-to: type=gha,mode=max,scope=stirling-pdf-latest
-          tags: ${{ secrets.DOCKER_HUB_USERNAME }}/test:test-${{ github.sha }}
+          tags: ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test:test-${{ github.sha }}
           build-args: VERSION_TAG=${{ steps.versionNumber.outputs.versionNumber }}
           platforms: linux/amd64
 
       - name: Set up SSH
         run: |
           mkdir -p ~/.ssh/
-          echo "${{ secrets.NEW_VPS_SSH_KEY }}" > ../private.key
+          echo "${NEW_VPS_SSH_KEY}" > ../private.key
           sudo chmod 600 ../private.key
 
+        env:
+          NEW_VPS_SSH_KEY: ${{ secrets.NEW_VPS_SSH_KEY }}
       - name: Deploy to VPS
         run: |
           cat > docker-compose.yml << EOF
@@ -97,7 +108,7 @@ jobs:
           services:
             stirling-pdf:
               container_name: stirling-pdf-test-${{ github.sha }}
-              image: ${{ secrets.DOCKER_HUB_USERNAME }}/test:test-${{ github.sha }}
+              image: ${IMAGE_BASE}:test-${{ github.sha }}
               ports:
                 - "1337:8080"
               volumes:
@@ -118,9 +129,9 @@ jobs:
               restart: on-failure:5
           EOF
 
-          scp -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null docker-compose.yml ${{ secrets.NEW_VPS_USERNAME }}@${{ secrets.NEW_VPS_HOST }}:/tmp/docker-compose.yml
+          scp -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null docker-compose.yml ${NEW_VPS_USERNAME}@${NEW_VPS_HOST}:/tmp/docker-compose.yml
 
-          ssh -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null ${{ secrets.NEW_VPS_USERNAME }}@${{ secrets.NEW_VPS_HOST }} << EOF
+          ssh -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null ${NEW_VPS_USERNAME}@${NEW_VPS_HOST} << EOF
             mkdir -p /stirling/test-${{ github.sha }}/{data,config,logs}
             mv /tmp/docker-compose.yml /stirling/test-${{ github.sha }}/docker-compose.yml
             cd /stirling/test-${{ github.sha }}
@@ -128,6 +139,10 @@ jobs:
             docker-compose up -d
           EOF
 
+        env:
+          IMAGE_BASE: ghcr.io/${{ steps.repoowner.outputs.lowercase }}/stirling-pdf-test
+          NEW_VPS_USERNAME: ${{ secrets.NEW_VPS_USERNAME }}
+          NEW_VPS_HOST: ${{ secrets.NEW_VPS_HOST }}
   files-changed:
     if: always()
     name: detect what files changed
@@ -150,6 +165,7 @@ jobs:
           filters: ".github/config/.files.yaml"
 
   test:
+    environment: pr-preview
     if: needs.files-changed.outputs.frontend == 'true'
     needs: [deploy, files-changed]
     runs-on: ubuntu-latest
@@ -185,6 +201,7 @@ jobs:
           FORCE_COLOR: "3"
 
   cleanup:
+    environment: pr-preview
     needs: [deploy, test]
     runs-on: ubuntu-latest
     if: always()
@@ -198,16 +215,21 @@ jobs:
       - name: Set up SSH
         run: |
           mkdir -p ~/.ssh/
-          echo "${{ secrets.NEW_VPS_SSH_KEY }}" > ../private.key
+          echo "${NEW_VPS_SSH_KEY}" > ../private.key
           sudo chmod 600 ../private.key
 
+        env:
+          NEW_VPS_SSH_KEY: ${{ secrets.NEW_VPS_SSH_KEY }}
       - name: Cleanup deployment
         if: always()
         run: |
-          ssh -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null ${{ secrets.NEW_VPS_USERNAME }}@${{ secrets.NEW_VPS_HOST }} << EOF
+          ssh -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null ${NEW_VPS_USERNAME}@${NEW_VPS_HOST} << EOF
             cd /stirling/test-${{ github.sha }}
             docker-compose down
             cd /stirling
             rm -rf test-${{ github.sha }}
           EOF
+        env:
+          NEW_VPS_USERNAME: ${{ secrets.NEW_VPS_USERNAME }}
+          NEW_VPS_HOST: ${{ secrets.NEW_VPS_HOST }}
         continue-on-error: true # Ensure cleanup runs even if previous steps fail