feat(storage): B2b — settings/profile schema + templates SQLite persistence

Settings: 8 new fields (lastLaunchAt, reentryFreshStartUntil,
lastActiveProfileId, microStepGranularity, nudgeMode, nudgeDigestTimes,
sparklineRangeDays, energyLabels) with sane defaults; nudgesEnabled
auto-maps to nudgeMode on first load (true→immediate, false→off).

Profile: optional energyLabelsOverride field on the localStorage
Profile shape — when present, overrides the global energyLabels;
absent/null falls through to settings.energyLabels via the new
resolveEnergyLabels helper.

Templates: migration v17 adds the templates table (id PK, name,
sections JSON, created_at, updated_at). 5 storage CRUD functions
plus import_templates with idempotent duplicate-id handling. 5 Tauri
commands (list/create/update/delete/import) wired and registered.
Frontend store rewired to read from SQLite via list_templates_cmd;
one-time migration imports kon_templates localStorage and clears it
on success. Fresh installs only seed the new {Meeting notes, Daily
check-in} defaults. Existing user templates survive the migration
verbatim.

Test coverage: 5 new Rust tests (CRUD, import idempotency, atomic
failure, updated_at bump, missing-id delete is no-op).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src-tauri/src/lib.rs

@@ -373,6 +373,12 @@ pub fn run() {
             commands::task_lists::update_task_list_cmd,
             commands::task_lists::delete_task_list_cmd,
             commands::task_lists::import_task_lists_cmd,
+            // B2b — templates CRUD (replaces kon_templates localStorage)
+            commands::templates::list_templates_cmd,
+            commands::templates::create_template_cmd,
+            commands::templates::update_template_cmd,
+            commands::templates::delete_template_cmd,
+            commands::templates::import_templates_cmd,
             // HITL feedback (Phase 2 roadmap)
             commands::feedback::record_feedback,
             commands::feedback::list_feedback_examples_cmd,