feat(#500): tap-to-reveal detail dialog for truncated item descriptions (#501)

* feat(#500): tap-to-reveal detail dialog for truncated cards

Add shared DetailDialog composable and wire tap-to-open full metadata
dialogs across Skills (installed + hub), MCP servers, Plugins, Toolsets,
and Webhooks screens. Action buttons stay on the card (sticky); tapping
the card body reveals untruncated description + key metadata.

Refs: #500

* fix(#500): resolve compile errors from missing runtime imports + dialog scope

- add missing androidx.compose.runtime.mutableStateOf/remember imports
  in InstalledSkillsTab + HubSkillsTab (caused 'Unresolved reference'
  cascade on compileDebugKotlin)
- move PluginsScreen detail dialog inside the composable function scope
  (was nested in OrphanPluginCard -> showDetail unresolved)
- DetailDialog rows type: Pair<String?,String?> -> Pair<String,String?>
  (key always non-null; fixes type-inference failure)
- drop unnecessary safe call on non-null label

Verified locally with the Android SDK:
  ./gradlew :app:compileDebugKotlin  -> BUILD SUCCESSFUL
  ./gradlew :app:testDebugUnitTest   -> BUILD SUCCESSFUL

Refs: #500

* refactor(#500): extract toDetailRows() mappers + semantic status tones; wire SkillsScreen hub browse

- add DetailRows.kt with @Composable extension mappers for Skill/HubSkill/
  McpServer/PluginInfo/Toolset/WebhookSubscription -> List<DetailRow>
- DetailDialog now renders status rows via LocalHermesStatusColors (review #2):
  SUCCESS/NEUTRAL/WARNING/ERROR/INFO tones instead of plain onSurfaceVariant
- wire SkillsScreen.HubBrowseView/HubSkillCard tap -> DetailDialog (same UX as
  other screens) — user request
- remove JVM-signature-clashing Pair overload; drop unused Color import
- add detail_dialog_trust_level string (HubSkill has no version field)
- verified: compileDebugKotlin + testDebugUnitTest PASS locally w/ ANDROID_HOME

* fix(#500): full hub description in dialog + no name truncation

- HubBrowseView (both SkillsScreen + HubSkillsTab): on card tap, fetch
  previewHubSkill(identifier) to get the FULL SkillContentResponse.content
  (search snippet was truncated); dialog shows full content once loaded,
  with a spinner while previewing. Falls back to snippet if no identifier.
- SkillsViewModel: add hubPreviewContent/isHubPreviewing/hubPreviewError
  state + previewHubSkill()/clearHubPreview() (uses existing preview endpoint)
- DetailDialog: title now wraps fully (removed maxLines=2 ellipsis cap) so
  long skill names are never cut off
- verified: compileDebugKotlin PASS + ktlint clean (local ANDROID_HOME)

app/src/main/res/values/strings.xml

@@ -630,6 +630,31 @@
     <string name="plugins_show_in_sidebar">Show in sidebar</string>
     <string name="plugins_hide_from_sidebar">Hide from sidebar</string>
 
+    <!-- Shared detail dialog (issue #500) -->
+    <string name="detail_dialog_no_info">No additional details available.</string>
+    <string name="detail_dialog_category">Category</string>
+    <string name="detail_dialog_source">Source</string>
+    <string name="detail_dialog_version">Version</string>
+    <string name="detail_dialog_status">Status</string>
+    <string name="detail_dialog_description">Description</string>
+    <string name="detail_dialog_tags">Tags</string>
+    <string name="detail_dialog_transport">Transport</string>
+    <string name="detail_dialog_label">Label</string>
+    <string name="detail_dialog_url">URL</string>
+    <string name="detail_dialog_command">Command</string>
+    <string name="detail_dialog_args">Arguments</string>
+    <string name="detail_dialog_env_vars">Environment Variables</string>
+    <string name="detail_dialog_tools">Tools</string>
+    <string name="detail_dialog_events">Events</string>
+    <string name="detail_dialog_deliver">Deliver to</string>
+    <string name="detail_dialog_prompt">Prompt</string>
+    <string name="detail_dialog_skills">Skills</string>
+    <string name="detail_dialog_created_at">Created</string>
+    <string name="detail_dialog_error">Error</string>
+    <string name="detail_dialog_status_enabled">Enabled</string>
+    <string name="detail_dialog_status_disabled">Disabled</string>
+    <string name="detail_dialog_trust_level">Trust Level</string>
+
     <!-- McpServers Screen -->
     <string name="mcp_servers_label_transport">Transport: %1$s</string>
     <string name="mcp_servers_label_command">Command:</string>