fix(ci): pr-iphone-deploy — remplacer paths trigger par dorny/paths-filter

Le paths sur on.pull_request ne fonctionne pas de manière fiable dans
Gitea Actions. Passage à un job 'changes' avec dorny/paths-filter@v3
(identique au pattern de ci.yml) qui détecte les changements dans
tabatago-swift/** avant de lancer le build sur le runner macos.

.github/workflows/pr-iphone-deploy.yml

@@ -8,9 +8,6 @@ on:
   pull_request:
     branches: [main]
     types: [opened, synchronize, reopened]
-    paths:
-      - 'tabatago-swift/**'
-      - '.github/workflows/pr-iphone-deploy.yml'
 
 permissions:
   contents: write
@@ -18,8 +15,28 @@ permissions:
 
 jobs:
 
+  # ── Path filter — only run if tabatago-swift changed ──
+  changes:
+    name: Detect Changes
+    runs-on: nas-runner
+    outputs:
+      tabatago-swift: ${{ steps.filter.outputs.tabatago-swift }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - uses: dorny/paths-filter@v3
+        id: filter
+        with:
+          filters: |
+            tabatago-swift:
+              - 'tabatago-swift/**'
+
   build-deploy:
     name: Build & Deploy to iPhone (WiFi/USB)
+    needs: changes
+    if: needs.changes.outputs.tabatago-swift == 'true'
     runs-on: macos
     timeout-minutes: 20