B1-3: distill Technology, MCP, and Data Maintenance settings sections into editor_settings spec

specs/editor_settings.allium

@@ -16,8 +16,10 @@ value SettingsView {
     editor_section: SettingsEditorSection?
     categories: List<SettingsCategoryRow>
     ai_section: SettingsAISection?
+    technology_section: SettingsTechnologySection?
     publishing_section: SettingsPublishingSection?
     mcp_section: SettingsMCPSection?
+    data_section: SettingsDataSection?
 }
 
 value SettingsProjectSection {
@@ -62,6 +64,12 @@ value SettingsAISection {
     system_prompt: String               -- textarea (12 rows) + Save + Reset to Default
 }
 
+value SettingsTechnologySection {
+    semantic_similarity_enabled: Boolean -- checkbox: enable duplicate search + related-post embeddings
+    -- Scripting runtime is fixed at the application layer; no runtime switch is exposed.
+    -- Saved together with project metadata (settings_project form).
+}
+
 value SettingsPublishingSection {
     ssh_mode: String                    -- select: scp | rsync
     ssh_host: String                    -- text input
@@ -70,13 +78,19 @@ value SettingsPublishingSection {
 }
 
 value SettingsMCPSection {
-    status: String                      -- port number or "Not running"
     agents: List<MCPAgentRow>
 }
 
 value MCPAgentRow {
     agent_name: String                  -- Claude Code, Claude Desktop, GitHub Copilot, etc.
-    is_installed: Boolean               -- Add/Remove toggle
+    is_supported: Boolean               -- false agents show a disabled button + "not supported yet" note
+    is_installed: Boolean               -- toggle label: Remove when installed, else Add
+    config_path: String?                -- agent config file path (nil when unsupported)
+}
+
+value SettingsDataSection {
+    -- Action-only section: rebuild buttons + Open Data Folder. No persisted fields.
+    rebuild_targets: List<String>       -- posts | media | scripts | templates | links | thumbnails | embedding
 }
 
 invariant SettingsProtectedCategories {
@@ -88,6 +102,8 @@ invariant SettingsMCPAgents {
     -- MCP section has exactly 7 agent rows in this order:
     -- Claude Code, Claude Desktop, GitHub Copilot, Gemini CLI,
     -- OpenCode, Mistral Vibe, OpenAI Codex.
+    -- Only Claude Code and GitHub Copilot are supported; the rest render a
+    -- disabled toggle and a "not supported in the rewrite yet" note.
 }
 
 config {
@@ -120,9 +136,11 @@ surface SettingsViewSurface {
         SettingsAISystemPromptReset()
         SettingsPublishingSaved(publishing_data)
         SettingsPublishingCleared()
+        SettingsTechnologySaved(technology_data)
         SettingsMCPAgentToggled(agent_name)
         SettingsRebuildRequested(entity_type)
         SettingsRegenerateThumbnailsRequested()
+        SettingsEmbeddingIndexRebuildRequested()
         SettingsOpenDataFolderRequested()
         StyleThemeSelected(theme_name)
         StyleApplyRequested(theme_name)
@@ -174,22 +192,27 @@ surface SettingsViewSurface {
         -- Per-model info: max output tokens, context window (when available).
 
     @guarantee TechnologySection
-        -- Section 5: scripting capabilities are configured at the application level;
-        --   this section does not expose implementation-specific runtime choices.
-        --   Semantic Similarity toggle.
+        -- Section 5: Semantic Similarity toggle
+        --   ("Enable duplicate search and related-post embeddings").
+        --   Scripting Runtime row is read-only descriptive text: scripting capabilities
+        --   are configured at the application layer and expose no runtime switch here.
+        --   Save button persists with project metadata (settings_project form).
 
     @guarantee PublishingSection
         -- Section 6: SSH Mode (scp/rsync), Host, Username, Remote Path.
         --   Save + Clear buttons.
 
     @guarantee MCPSection
-        -- Section 7: Status badge (port or "Not running").
-        -- 7 agent rows with Add/Remove toggle each.
+        -- Section 7: 7 agent rows, each with the agent label, its config-file path
+        --   as a subtitle (or "not supported yet" note), and a toggle button.
+        -- Supported agents (Claude Code, GitHub Copilot) toggle Add/Remove,
+        --   writing/removing the bDS server entry in the agent config file.
+        -- Unsupported agents render a disabled button.
 
     @guarantee DataMaintenanceSection
-        -- Section 8: 6 rebuild buttons (Posts from Files, Media from Files,
+        -- Section 8: 7 rebuild buttons (Posts from Files, Media from Files,
         --   Scripts from Files, Templates from Files, Links,
-        --   Regenerate Missing Thumbnails).
+        --   Regenerate Missing Thumbnails, Rebuild Embedding Index).
         -- Open Data Folder button.
         -- Each rebuild executes immediately (no confirmation).
         -- Runs as background task with progress in Tasks panel.
@@ -203,7 +226,7 @@ surface SettingsViewSurface {
 
 rule SettingsRebuild {
     when: SettingsRebuildRequested(entity_type)
-    -- entity_type: posts | media | scripts | templates | links | thumbnails
+    -- entity_type: posts | media | scripts | templates | links | thumbnails | embedding
     -- Executes immediately (no confirmation dialog)
     -- Runs as background task with progress visible in Tasks panel
     -- On completion: wholesale replaces store data for that entity type