feat(ux): add CTAs to EmptyState across screens (issue #618) (#627)

Turn dead-end empty states into on-ramps by wiring the existing
EmptyState actionLabel/onAction params to real next actions.

Screens wired (real, existing actions):
- Skills (installed): Browse skill hub -> setViewMode(HUB)
- Skills (hub): Retry search -> searchHub(hubQuery)
- Cron Jobs: Create your first job -> openNewJobDialog()
- MCP servers: Add a server -> toggleAddForm() (literal moved to strings.xml)
- Webhooks: Create subscription -> showCreateDialog() (literal moved to strings.xml)
- Channels: Connect a Telegram channel -> startTelegramOnboarding()
- Model: Configure model -> navigateTo(SettingsConnection)
- Sessions (history): Start a new chat -> navigateTo(ChatScreen)
- Analytics: Explore Skills or Cron jobs -> navigateTo(SkillsScreen)
- Keys (no match): Clear search -> query = ""

All new labels use strings.xml (empty_action_* / screenname_empty_*).

Deviations from issue (documented honestly):
- Toolsets, Profiles, Plugins keep Refresh. No in-app create path exists
  (toolsets are server-defined toggles; profiles/plugins have no create
  dialog wired in UI). Refresh is the correct recovery there, not a fake
  'create' CTA. Flagged for follow-up if create flows get built.
- Skills: edited the real private InstalledSkillsView in SkillsScreen.kt;
  the duplicate internal one in InstalledSkillsTab.kt is dead code.

Verified: ktlintCheck clean, assembleDebug green.

Co-authored-by: M57 <hy4ri@users.noreply.github.com>
Co-authored-by: Ronia <ronia@hermes>

app/src/main/java/com/m57/hermescontrol/ui/analytics/AnalyticsScreen.kt

@@ -39,7 +39,9 @@ import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
+import com.m57.hermescontrol.NavigationController
 import com.m57.hermescontrol.R
+import com.m57.hermescontrol.SkillsScreen
 import com.m57.hermescontrol.data.model.AnalyticsDailyEntry
 import com.m57.hermescontrol.data.model.ModelsAnalyticsModelEntry
 import com.m57.hermescontrol.theme.LocalHermesStatusColors
@@ -89,6 +91,8 @@ fun AnalyticsScreen(
                     title = stringResource(R.string.analytics_empty_title),
                     subtitle = stringResource(R.string.analytics_empty_desc),
                     icon = Icons.Filled.BarChart,
+                    actionLabel = stringResource(R.string.empty_action_explore),
+                    onAction = { NavigationController.navigateTo(SkillsScreen) },
                 )
             }
 

app/src/main/java/com/m57/hermescontrol/ui/channels/ChannelsScreen.kt

@@ -147,6 +147,8 @@ fun ChannelsScreen(
                 EmptyState(
                     title = stringResource(R.string.channels_empty_title),
                     subtitle = stringResource(R.string.channels_empty_desc),
+                    actionLabel = stringResource(R.string.empty_action_connect_telegram),
+                    onAction = { viewModel.startTelegramOnboarding() },
                     modifier = Modifier.padding(paddingValues),
                 )
             }

app/src/main/java/com/m57/hermescontrol/ui/cron/CronJobsScreen.kt

@@ -112,6 +112,8 @@ fun CronJobsScreen(
                     icon = Icons.Filled.Schedule,
                     title = stringResource(R.string.cron_empty_title),
                     subtitle = stringResource(R.string.cron_empty_desc),
+                    actionLabel = stringResource(R.string.empty_action_create_job),
+                    onAction = { viewModel.openNewJobDialog() },
                 )
             }
 

app/src/main/java/com/m57/hermescontrol/ui/keys/KeysScreen.kt

@@ -158,8 +158,10 @@ fun KeysScreen(
                     if (filteredCategories.isEmpty() && query.isNotBlank()) {
                         item(key = "no-results") {
                             EmptyState(
-                                title = "No matching keys",
-                                subtitle = "Try a different search term.",
+                                title = stringResource(R.string.keys_no_matching_title),
+                                subtitle = stringResource(R.string.keys_no_matching_desc),
+                                actionLabel = stringResource(R.string.empty_action_clear_search),
+                                onAction = { query = "" },
                                 modifier = Modifier.padding(paddingValues),
                             )
                         }

app/src/main/java/com/m57/hermescontrol/ui/mcp/McpServersScreen.kt

@@ -155,8 +155,10 @@ fun McpServersScreen(
                     if (filteredServers.isEmpty() && query.isEmpty()) {
                         item(key = "empty") {
                             EmptyState(
-                                title = "No MCP servers",
-                                subtitle = "Add a server above or from the catalog.",
+                                title = stringResource(R.string.mcp_servers_empty_title),
+                                subtitle = stringResource(R.string.mcp_servers_empty_desc),
+                                actionLabel = stringResource(R.string.empty_action_add_server),
+                                onAction = { viewModel.toggleAddForm() },
                             )
                         }
                     } else if (filteredServers.isEmpty()) {

app/src/main/java/com/m57/hermescontrol/ui/model/ModelScreen.kt

@@ -54,7 +54,9 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
+import com.m57.hermescontrol.NavigationController
 import com.m57.hermescontrol.R
+import com.m57.hermescontrol.SettingsConnection
 import com.m57.hermescontrol.ui.common.EmptyState
 import com.m57.hermescontrol.ui.common.ErrorState
 import com.m57.hermescontrol.ui.common.HermesScaffold
@@ -116,8 +118,8 @@ fun ModelScreen(
                 EmptyState(
                     title = stringResource(R.string.model_empty_title),
                     subtitle = stringResource(R.string.model_empty_desc),
-                    onAction = { viewModel.loadAll() },
-                    actionLabel = stringResource(R.string.content_desc_refresh),
+                    actionLabel = stringResource(R.string.empty_action_configure_model),
+                    onAction = { NavigationController.navigateTo(SettingsConnection) },
                     modifier = Modifier.padding(paddingValues),
                 )
             }

app/src/main/java/com/m57/hermescontrol/ui/sessions/SessionsScreen.kt

@@ -595,6 +595,8 @@ fun SessionsScreen(
                             title = stringResource(R.string.history_empty_title),
                             subtitle = stringResource(R.string.history_empty_desc),
                             icon = Icons.Filled.History,
+                            actionLabel = stringResource(R.string.empty_action_start_chat),
+                            onAction = { NavigationController.navigateTo(ChatScreen) },
                         )
                     }
 

app/src/main/java/com/m57/hermescontrol/ui/skills/SkillsScreen.kt

@@ -150,6 +150,7 @@ fun SkillsScreen(
                         isUninstalling = state.isUninstalling,
                         uninstallingSkillName = state.uninstallingSkillName,
                         onRefresh = viewModel::loadSkills,
+                        onBrowseHub = { viewModel.setViewMode(SkillsViewMode.HUB) },
                     )
                 }
 
@@ -219,6 +220,7 @@ private fun InstalledSkillsView(
     isUninstalling: Boolean,
     uninstallingSkillName: String?,
     onRefresh: () -> Unit,
+    onBrowseHub: () -> Unit,
 ) {
     var showDetail by remember { mutableStateOf<Skill?>(null) }
 
@@ -332,6 +334,8 @@ private fun InstalledSkillsView(
                 EmptyState(
                     icon = Icons.Filled.Extension,
                     title = stringResource(R.string.skills_empty_message),
+                    actionLabel = stringResource(R.string.empty_action_browse_hub),
+                    onAction = onBrowseHub,
                 )
             }
 

app/src/main/java/com/m57/hermescontrol/ui/skills/components/HubSkillsTab.kt

@@ -131,6 +131,8 @@ internal fun HubBrowseView(
                 EmptyState(
                     icon = Icons.Filled.Extension,
                     title = stringResource(R.string.skills_hub_empty_results),
+                    actionLabel = stringResource(R.string.empty_action_retry_search),
+                    onAction = { onSearch(hubQuery) },
                 )
             }
 

app/src/main/java/com/m57/hermescontrol/ui/webhooks/WebhooksScreen.kt

@@ -341,7 +341,7 @@ fun WebhooksScreen(
                             EmptyState(
                                 title =
                                     if (state.subscriptions.isEmpty()) {
-                                        "No subscriptions"
+                                        stringResource(R.string.webhooks_empty_title)
                                     } else {
                                         stringResource(R.string.webhooks_no_matching)
                                     },
@@ -351,6 +351,18 @@ fun WebhooksScreen(
                                     } else {
                                         stringResource(R.string.webhooks_no_matching_desc)
                                     },
+                                actionLabel =
+                                    if (state.subscriptions.isEmpty()) {
+                                        stringResource(R.string.webhooks_action_add)
+                                    } else {
+                                        null
+                                    },
+                                onAction =
+                                    if (state.subscriptions.isEmpty()) {
+                                        { viewModel.showCreateDialog() }
+                                    } else {
+                                        null
+                                    },
                             )
                         }
                     } else {