docs: publish the documentation as a GitHub Pages site

.github/CONTRIBUTING.md

@@ -13,7 +13,7 @@ welcome — bug reports, feature ideas, translations, docs, and code.
 - **Questions and ideas:** use
   [Discussions](https://github.com/tempus2016/taskmate/discussions) rather than
   an issue.
-- **Check the [Troubleshooting wiki](https://github.com/tempus2016/taskmate/wiki/Troubleshooting)**
+- **Check the [Troubleshooting guide](https://tempus2016.github.io/taskmate/Troubleshooting/)**
   first for common problems.
 
 ## Project layout

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -11,7 +11,7 @@ body:
       value: |
         Thanks for taking the time to report a bug. Please fill in as much detail as possible — it helps fix issues faster.
 
-        Before submitting, please check the [Troubleshooting wiki page](https://github.com/tempus2016/taskmate/wiki/Troubleshooting) and [existing issues](https://github.com/tempus2016/taskmate/issues) to see if your issue is already covered.
+        Before submitting, please check the [Troubleshooting guide](https://tempus2016.github.io/taskmate/Troubleshooting/) and [existing issues](https://github.com/tempus2016/taskmate/issues) to see if your issue is already covered.
 
   # ── Environment ──────────────────────────────────────────────────────────────
 
@@ -231,7 +231,7 @@ body:
     attributes:
       label: Before Submitting
       options:
-        - label: I have checked the [Troubleshooting wiki](https://github.com/tempus2016/taskmate/wiki/Troubleshooting) and my issue is not covered there
+        - label: I have checked the [Troubleshooting guide](https://tempus2016.github.io/taskmate/Troubleshooting/) and my issue is not covered there
           required: true
         - label: I have searched [existing issues](https://github.com/tempus2016/taskmate/issues) and this is not a duplicate
           required: true

.github/ISSUE_TEMPLATE/config.yml

@@ -1,7 +1,7 @@
 blank_issues_enabled: false
 contact_links:
-  - name: 📖 Troubleshooting Wiki
-    url: https://github.com/tempus2016/taskmate/wiki/Troubleshooting
+  - name: 📖 Troubleshooting guide
+    url: https://tempus2016.github.io/taskmate/Troubleshooting/
     about: Check here first — most common issues are covered
   - name: 💬 Discussions
     url: https://github.com/tempus2016/taskmate/discussions

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -144,5 +144,5 @@ body:
       options:
         - label: I have searched [existing issues](https://github.com/tempus2016/taskmate/issues) and this has not already been requested
           required: true
-        - label: I have checked the [wiki](https://github.com/tempus2016/taskmate/wiki) and this feature doesn't already exist
+        - label: I have checked the [documentation](https://tempus2016.github.io/taskmate/) and this feature doesn't already exist
           required: true

.github/workflows/docs.yml

@@ -0,0 +1,79 @@
+name: Docs
+
+# Builds the documentation site from wiki/ with MkDocs Material and publishes
+# it to GitHub Pages (https://tempus2016.github.io/taskmate/).
+#
+# Pull requests only build, in strict mode, so a broken internal link or a
+# missing image fails here instead of on the live site. Pushes to main build
+# and deploy.
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - "wiki/**"
+      - "mkdocs.yml"
+      - "requirements-docs.txt"
+      - ".github/workflows/docs.yml"
+  pull_request:
+    branches: [main]
+    paths:
+      - "wiki/**"
+      - "mkdocs.yml"
+      - "requirements-docs.txt"
+      - ".github/workflows/docs.yml"
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    name: Build docs
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - name: Set up Python
+        uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
+        with:
+          python-version: "3.14"
+
+      - name: Install MkDocs
+        run: python -m pip install -r requirements-docs.txt
+
+      - name: Build site
+        run: python -m mkdocs build --strict --site-dir site
+
+      - name: Upload Pages artifact
+        if: github.event_name != 'pull_request'
+        uses: actions/upload-pages-artifact@fc324d3547104276b827a68afc52ff2a11cc49c9 # v5.0.0
+        with:
+          path: site
+
+  deploy:
+    name: Deploy to GitHub Pages
+    if: github.event_name != 'pull_request'
+    needs: build
+    runs-on: ubuntu-latest
+
+    permissions:
+      pages: write
+      id-token: write
+
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    steps:
+      - name: Deploy
+        id: deployment
+        uses: actions/deploy-pages@368f82528645a54fb793d4d04e342629a3f51346 # v5.0.1

.pre-commit-config.yaml

@@ -25,8 +25,9 @@ repos:
       - id: end-of-file-fixer
       - id: check-json
       - id: check-yaml
-        # Blueprints use HA's !input tag, which plain YAML can't resolve.
-        exclude: ^blueprints/
+        # Blueprints use HA's !input tag and mkdocs.yml a !!python tag for its
+        # heading slugs; plain YAML can resolve neither.
+        exclude: ^(blueprints/|mkdocs\.yml$)
       - id: check-merge-conflict
       - id: check-case-conflict
       - id: check-added-large-files