refactor(i18n): route planning-pane labels through the catalog (T-467)

Migrate the user-facing strings in builtin.tickets, builtin.pql,
builtin.decisions, and builtin.problems (list/detail views, section headers,
filters, empty/loading/error states, type chips) to ClideSettings.i18n; extend
each extension's catalog. The detail/links tabs that had a bare title now wire
titleKey + i18nNamespace so the tab title resolves too. Context threaded into
the static label helpers. No en_US behaviour change (D-21).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lib/kernel/src/i18n/catalog/builtin.decisions_en_us.json

@@ -1,3 +1,16 @@
 {
-  "tab.title": { "translation": "Decisions" }
+  "tab.title": { "translation": "Decisions" },
+  "tab.detail.title": { "translation": "Decision" },
+  "loading": { "translation": "Loading decisions..." },
+  "error.load": { "translation": "failed to load decisions" },
+  "empty": { "translation": "No decisions found.\nRun `pql decisions sync` to index." },
+  "filter.hint": { "translation": "Filter decisions…" },
+  "refresh.tooltip": { "translation": "Refresh decisions" },
+  "section.confirmed": { "translation": "CONFIRMED" },
+  "section.questions": { "translation": "QUESTIONS" },
+  "section.rejected": { "translation": "REJECTED" },
+  "badge.resolved": { "translation": "resolved" },
+  "detail.loading": { "translation": "Loading…" },
+  "detail.empty": { "translation": "Select a decision to view details." },
+  "detail.section.refs": { "translation": "CROSS-REFERENCES" }
 }

lib/kernel/src/i18n/catalog/builtin.pql_en_us.json

@@ -1,3 +1,16 @@
 {
-  "tab.title": { "translation": "pql" }
+  "tab.title": { "translation": "pql" },
+  "tab.links.title": { "translation": "Links" },
+  "filter.markdown.hint": { "translation": "Filter markdown…" },
+  "loading": { "translation": "Loading…" },
+  "empty.markdown": { "translation": "No markdown files found." },
+  "search.vault.hint": { "translation": "Search vault…" },
+  "search.query.hint": { "translation": "PQL query…" },
+  "backlinks.empty": { "translation": "Open a file to see its links." },
+  "backlinks.loading": { "translation": "Loading…" },
+  "backlinks.semantics": { "translation": "backlinks for {path}" },
+  "group.backlinks": { "translation": "Backlinks" },
+  "group.outlinks": { "translation": "Outlinks" },
+  "group.label": { "translation": "{label} ({count})" },
+  "group.none": { "translation": "None" }
 }

lib/kernel/src/i18n/catalog/builtin.problems_en_us.json

@@ -1,3 +1,10 @@
 {
-  "tab.title": { "translation": "Problems" }
+  "tab.title": { "translation": "Problems" },
+  "semantics.panel": { "translation": "problems panel" },
+  "filter.hint": { "translation": "Filter problems…" },
+  "count": { "translation": "Problems ({count})" },
+  "refresh.label": { "translation": "Refresh" },
+  "refresh.semantics": { "translation": "refresh problems" },
+  "scanning": { "translation": "Scanning…" },
+  "empty": { "translation": "No problems found." }
 }

lib/kernel/src/i18n/catalog/builtin.tickets_en_us.json

@@ -1,3 +1,36 @@
 {
-  "tab.title": { "translation": "Tickets" }
+  "tab.title": { "translation": "Tickets" },
+  "tab.detail.title": { "translation": "Ticket" },
+  "type.initiative": { "translation": "Initiative" },
+  "type.epic": { "translation": "Epic" },
+  "type.story": { "translation": "Story" },
+  "type.task": { "translation": "Task" },
+  "type.bug": { "translation": "Bug" },
+  "loading": { "translation": "Loading tickets..." },
+  "error.load": { "translation": "failed to load tickets" },
+  "empty": { "translation": "No tickets.\nRun `pql ticket new` to create one." },
+  "filter.hint": { "translation": "Filter tickets…" },
+  "refresh.tooltip": { "translation": "Refresh tickets" },
+  "section.in_progress": { "translation": "IN PROGRESS" },
+  "section.review": { "translation": "REVIEW" },
+  "section.ready": { "translation": "READY" },
+  "section.backlog": { "translation": "BACKLOG" },
+  "section.done": { "translation": "DONE" },
+  "section.cancelled": { "translation": "CANCELLED" },
+  "chip.label": { "translation": "{type} type filter" },
+  "chip.tooltip": { "translation": "Click to toggle · double-click to isolate" },
+  "badge.wip": { "translation": "WIP" },
+  "badge.review": { "translation": "REVIEW" },
+  "badge.cancelled": { "translation": "CANCELLED" },
+  "pickUp.tooltip": { "translation": "Pick up — hand this ticket to the Claude pane" },
+  "detail.loading": { "translation": "Loading…" },
+  "detail.empty": { "translation": "Select a ticket to view details." },
+  "detail.assigned": { "translation": "assigned: {name}" },
+  "detail.section.parents": { "translation": "PARENT TREE" },
+  "detail.section.decisions": { "translation": "REFERENCED DECISIONS" },
+  "status.backlog": { "translation": "BACKLOG" },
+  "status.ready": { "translation": "READY" },
+  "status.in_progress": { "translation": "WIP" },
+  "status.review": { "translation": "REVIEW" },
+  "status.done": { "translation": "DONE" }
 }