Fix what a full test round of today's releases found: a ticking single clock, a switch that works in standby, no taps from a swipe (0.2.78)

A test and code-analysis round of 0.2.72 to 0.2.76 (suites at every tag, sanitizers, ESP32 and GitHub builds, host
harnesses on both boards, the editor in a browser, best practice checked against ESPHome, LVGL, Home Assistant and
Vue) found these, fixed here with Max's choices for the product questions:

- Firmware 0.2.65: the second hand of a single analog clock moves again; on a page that is one full on/off tile the
  waking push also switches it; on the Guition a flick is never a tap and a finger that slides off a tile doesn't tap
  it; Previous/Next react to a firm press; the same Go to page tile may sit on several pages; a layout the screen has
  no memory for is refused instead of crashing; 64-bit redraw mask for 48 tiles; Montserrat 14 no longer built.
- App: Save refuses a layout too long for one message or too big for eight pages; an offline screen keeps its
  firmware version from the device registry; HA refusals reach the editor; 128 KB requests; changelog out of the
  live stream; cached hashed assets; tini as init and a clean stop; changelog parsing without asterisks or crashes.
- Editor: clicking the open screen keeps unsaved edits, edits during a save stay unsaved, a Page row and phone
  dragging to other pages, repeated page tiles, limits from the server, HA's error messages, a type-checked build.
- tools/check.sh + GitHub Actions + a CYD flash budget; docs match 48 tiles and the new editor.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

.github/workflows/ci.yml

@@ -0,0 +1,73 @@
+# The release checks of docs/RELEASING.md step 2 on every push and pull request to main (app 0.2.78). Both jobs run
+# tools/check.sh, the same script a release runs on a laptop, so CI and a local run can't drift apart.
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
+jobs:
+  checks:
+    name: checks
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+      # What the add-on image adds to ESPHome's (screen_manager/Dockerfile), Pillow for the camera tests (ESPHome
+      # brings it in the image) and fontTools for tools/generate_icons.py.
+      - name: Python packages
+        run: python -m pip install 'aiohttp>=3.12,<4' PyYAML Pillow fonttools
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: npm
+          cache-dependency-path: web/package-lock.json
+      - name: clang
+        run: clang++ --version || (sudo apt-get update && sudo apt-get install -y clang)
+      - name: tools/check.sh
+        run: bash tools/check.sh
+        env:
+          PYTHON: python
+          CXX: clang++
+
+  firmware:
+    name: firmware
+    needs: checks
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+      # The ESPHome the add-on ships and builds every screen's update with.
+      - name: ESPHome version of the add-on
+        id: esphome
+        run: echo "version=$(sed -n 's|^FROM ghcr.io/esphome/esphome:||p' screen_manager/Dockerfile)" >> "$GITHUB_OUTPUT"
+      - name: ESPHome
+        run: python -m pip install "esphome==${{ steps.esphome.outputs.version }}"
+      # PlatformIO's toolchains and ESP-IDF, and the two check builds (tools/check.sh builds under .esphome/check).
+      - uses: actions/cache@v4
+        with:
+          path: |
+            ~/.platformio
+            .esphome/check
+          key: firmware-${{ runner.os }}-esphome-${{ steps.esphome.outputs.version }}-${{ hashFiles('home-like-2432s028.yaml', 'guition-4848s040.yaml', 'components/**') }}
+          restore-keys: |
+            firmware-${{ runner.os }}-esphome-${{ steps.esphome.outputs.version }}-
+      - name: tools/check.sh --firmware
+        run: bash tools/check.sh --firmware
+        env:
+          PYTHON: python