chore(cleanup): drop legacy global dictionary Tauri commands — profile_terms is canonical

Task 16 of Phase 2 Remaining. Removes the three global-dictionary Tauri
commands now that all frontend callers were migrated to the profile-scoped
equivalents in Task 15:

- list_dictionary_command
- add_dictionary_entry_command
- delete_dictionary_entry_command

Also drops the DictionaryDto and its From<DictionaryEntry> impl (dead
alongside the commands), plus the now-unused kon_storage imports
(list_dictionary, add_dictionary_entry, delete_dictionary_entry,
DictionaryEntry). The storage-layer functions and the dictionary table
itself stay until Task 17 drops them.

Codex verification point 5 cleared: zero frontend callers for the legacy
commands (or their _cmd aliases) before deletion.

cargo check -p kon: clean.
cargo test --workspace: 40 passed; pre-existing ensure_x11_on_wayland
doctest failure at src-tauri/src/lib.rs:77 unchanged.

src-tauri/src/commands/transcripts.rs

@@ -1,21 +1,24 @@
-// Tauri commands wrapping the kon_storage transcript and dictionary CRUD.
+// Tauri commands wrapping the kon_storage transcript CRUD.
 // These are the bridge that lets the Svelte frontend treat SQLite as the
 // canonical store rather than localStorage.
 //
 // Day 4 of the upgrade plan. The frontend HistoryPage rename flow has had
 // a `// TODO: persist to SQLite when update_transcript exists` for some
 // time; that command now exists.
+//
+// Task 16 — the legacy global-dictionary commands
+// (`list_dictionary_command`, `add_dictionary_entry_command`,
+// `delete_dictionary_entry_command`) were dropped; profile-scoped
+// `profile_terms` commands in `commands::profiles` are now canonical.
 
 use serde::{Deserialize, Serialize};
 
 use kon_storage::{
-    add_dictionary_entry, count_transcripts, delete_dictionary_entry,
-    delete_transcript as db_delete_transcript, get_transcript as db_get_transcript,
-    insert_transcript as db_insert_transcript, list_dictionary,
+    count_transcripts, delete_transcript as db_delete_transcript,
+    get_transcript as db_get_transcript, insert_transcript as db_insert_transcript,
     list_transcripts_paged, search_transcripts as db_search_transcripts,
     update_transcript as db_update_transcript,
-    update_transcript_meta as db_update_transcript_meta, DictionaryEntry, InsertTranscriptParams,
-    TranscriptRow,
+    update_transcript_meta as db_update_transcript_meta, InsertTranscriptParams, TranscriptRow,
 };
 
 use crate::AppState;
@@ -233,57 +236,3 @@ pub async fn update_transcript_meta_cmd(
     Ok(TranscriptDto::from(row))
 }
 
-// --- Dictionary commands (custom vocabulary) ---
-
-#[derive(Debug, Clone, Serialize)]
-#[serde(rename_all = "camelCase")]
-pub struct DictionaryDto {
-    pub id: i64,
-    pub term: String,
-    pub note: Option<String>,
-}
-
-impl From<DictionaryEntry> for DictionaryDto {
-    fn from(e: DictionaryEntry) -> Self {
-        Self {
-            id: e.id,
-            term: e.term,
-            note: e.note,
-        }
-    }
-}
-
-#[tauri::command]
-pub async fn list_dictionary_command(
-    state: tauri::State<'_, AppState>,
-) -> Result<Vec<DictionaryDto>, String> {
-    list_dictionary(&state.db)
-        .await
-        .map(|rows| rows.into_iter().map(DictionaryDto::from).collect())
-        .map_err(|e| e.to_string())
-}
-
-#[tauri::command]
-pub async fn add_dictionary_entry_command(
-    state: tauri::State<'_, AppState>,
-    term: String,
-    note: Option<String>,
-) -> Result<i64, String> {
-    let term = term.trim();
-    if term.is_empty() {
-        return Err("Dictionary term cannot be empty".into());
-    }
-    add_dictionary_entry(&state.db, term, note.as_deref())
-        .await
-        .map_err(|e| e.to_string())
-}
-
-#[tauri::command]
-pub async fn delete_dictionary_entry_command(
-    state: tauri::State<'_, AppState>,
-    id: i64,
-) -> Result<(), String> {
-    delete_dictionary_entry(&state.db, id)
-        .await
-        .map_err(|e| e.to_string())
-}

src-tauri/src/lib.rs

@@ -283,9 +283,6 @@ pub fn run() {
             commands::transcripts::update_transcript_meta_cmd,
             commands::transcripts::delete_transcript,
             commands::transcripts::search_transcripts,
-            commands::transcripts::list_dictionary_command,
-            commands::transcripts::add_dictionary_entry_command,
-            commands::transcripts::delete_dictionary_entry_command,
             // Diagnostics (panic + error capture, manual report bundle)
             commands::diagnostics::log_frontend_error,
             commands::diagnostics::list_recent_errors_command,