feat(intentions): Phase 7 — if-then rules for task / time / triage triggers

Small if-then automation layer. Rules persist in SQLite; the runner
lives on the frontend and binds to the Phase 6 event bus so the rule
pipeline reuses the same delivery primitives (timer events, TTS,
Tasks navigation).

Storage:
- Migration v12 adds implementation_rules (id, enabled, trigger_kind,
  trigger_value, actions_json, last_fired_key, created_at,
  updated_at) with enabled+trigger_kind index for the runner's hot
  path.
- CRUD helpers: insert / list / get / set-enabled / mark-fired /
  delete, plus a round-trip test.

Commands (all main-window-guarded via ensure_main_window):
- list_implementation_rules
- create_implementation_rule — validates HH:MM, checks the target
  task exists at save time for surface-task actions, caps
  speak-line at 240 chars, pins v1 timers to 5 minutes.
- set_implementation_rule_enabled
- mark_implementation_rule_fired — main-thread idempotency shim so
  the runner can atomically claim a fire.
- delete_implementation_rule

Runner (implementationIntentions.svelte.ts):
- Subscribes to kon:task-completed and kon:morning-triage-finished
  (MorningTriageModal now emits on all three exit paths — empty,
  skipped, picked — so skip counts as finishing).
- 30 s poll for time-of-day rules, plus an immediate check on startup
  so a rule whose time has already passed today catches up once.
- Idempotency via last_fired_key composed as YYYY-MM-DD@HH:MM for
  time rules; new time rules whose HH:MM has already passed today
  are pre-seeded so they don't fire retroactively on save.
- Rules are paused when Nudges "Mute for now" is on — a hard mute
  stops all rule delivery in addition to OS notifications.
- Stale-task safety: if a surface-task action's target has been
  deleted, the runner opens Tasks and warns clearly rather than
  pretending to surface something that's gone.

Editor (ImplementationRulesEditor.svelte):
- Lives in Settings under a new "If-then rules" accordion section.
- `If` picker: time of day (with time input), a task completes,
  morning triage finishes.
- `Then` composer: optional surface (inbox / today / all tasks /
  specific task), optional 5-min timer, optional speak-aloud line.
- Saved rules list with enable toggle + delete.

Rules table integration for Phase 10b rename sweep: add
implementation_rules to the kon.db → corbie.db migration shim when
that phase lands.

Gates: fmt, clippy -D warnings, cargo test 265/0, svelte-check
0/0, npm build green. Pre-existing Vite chunk warning on sounds.ts
is unrelated to Phase 7.

crates/storage/src/lib.rs

@@ -8,13 +8,15 @@ pub const DEFAULT_PROFILE_ID: &str = "00000000-0000-0000-0000-000000000001";
 
 pub use database::{
     add_profile_term, complete_subtask_and_check_parent, complete_task, count_transcripts,
-    create_profile, delete_profile, delete_profile_term, delete_task, delete_transcript,
-    get_profile, get_setting, get_task_by_id, get_transcript, init, insert_subtask, insert_task,
-    insert_transcript, list_feedback_examples, list_profile_terms, list_profiles,
-    list_recent_errors, list_subtasks, list_tasks, list_transcripts, list_transcripts_paged,
-    log_error, record_feedback, search_transcripts, set_setting, set_task_energy, uncomplete_task,
-    update_profile, update_task, update_transcript, update_transcript_meta, ErrorLogRow,
-    FeedbackRow, FeedbackTargetType, InsertTranscriptParams, ProfileRow, ProfileTermRow,
-    RecordFeedbackParams, TaskRow, TranscriptRow,
+    create_profile, delete_implementation_rule, delete_profile, delete_profile_term, delete_task,
+    delete_transcript, get_implementation_rule, get_profile, get_setting, get_task_by_id,
+    get_transcript, init, insert_implementation_rule, insert_subtask, insert_task,
+    insert_transcript, list_feedback_examples, list_implementation_rules, list_profile_terms,
+    list_profiles, list_recent_errors, list_subtasks, list_tasks, list_transcripts,
+    list_transcripts_paged, log_error, mark_implementation_rule_fired, record_feedback,
+    search_transcripts, set_implementation_rule_enabled, set_setting, set_task_energy,
+    uncomplete_task, update_profile, update_task, update_transcript, update_transcript_meta,
+    ErrorLogRow, FeedbackRow, FeedbackTargetType, ImplementationRuleRow, InsertTranscriptParams,
+    ProfileRow, ProfileTermRow, RecordFeedbackParams, TaskRow, TranscriptRow,
 };
 pub use file_storage::{app_data_dir, crashes_dir, database_path, logs_dir, recordings_dir};