update config, admin-web tooling & relocate agent skills

Update app.json config and add new dependencies in package.json. Update
.gitignore for new patterns. Add timed-exercise editor/list components,
warmup/stretch video migration, and Supabase helpers in admin-web.
Relocate agent skills from .agents/skills/ to .opencode/skills/.

app.json

@@ -21,7 +21,10 @@
       },
       "config": {
         "usesNonExemptEncryption": false
-      }
+      },
+      "associatedDomains": [
+        "applinks:tabatafit.app"
+      ]
     },
     "android": {
       "adaptiveIcon": {
@@ -32,7 +35,31 @@
       },
       "edgeToEdgeEnabled": true,
       "predictiveBackGestureEnabled": false,
-      "package": "com.millianlmx.tabatafit"
+      "package": "com.millianlmx.tabatafit",
+      "intentFilters": [
+        {
+          "action": "VIEW",
+          "autoVerify": true,
+          "data": [
+            {
+              "scheme": "https",
+              "host": "tabatafit.app",
+              "pathPrefix": "/workout"
+            },
+            {
+              "scheme": "https",
+              "host": "tabatafit.app",
+              "pathPrefix": "/player"
+            },
+            {
+              "scheme": "https",
+              "host": "tabatafit.app",
+              "pathPrefix": "/program"
+            }
+          ],
+          "category": ["BROWSABLE", "DEFAULT"]
+        }
+      ]
     },
     "web": {
       "output": "static",