feat(questions): make brand questions the primary monitoring & template axis

- add /questions/combination-fill endpoint with AI-driven, IP-region-aware matrix fill
- extract ip2region resolver from ops/app into shared/ipregion for cross-service use
- thread question_id filter through dashboard composite, citation summary, and collect-now
- switch template wizard from keyword inputs to brand-question selection (primary + supplemental)
- pass brand_question and supplemental_questions through assist/title/outline prompts
- add AiWaitingModal + 45s client timeout and request_timeout error mapping for long AI flows

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

apps/admin-web/src/i18n/messages/en-US.ts

@@ -151,6 +151,8 @@ const enUS = {
       template_outline_generate: 'AI Outline Generation',
       kol_prompt_generate: 'KOL Prompt Generation',
       kol_prompt_optimize: 'KOL Prompt Optimize',
+      question_distill: 'AI Candidate Question Generation',
+      question_combination_fill: 'Expansion Tool AI Fill',
     },
     aiUsageStatus: {
       pending: 'Processing',
@@ -243,9 +245,20 @@ const enUS = {
   aiPoints: {
     balance: 'Available Points',
     baseChars: 'Base Characters',
+    usageTypeFallback: 'AI Service Call',
     ledgerTitle: 'Usage Ledger',
     ledgerLimit: 'Latest {limit} records',
     ledgerTotal: '{total} records',
+    refundedHelp:
+      'The system deducted points first. After the task failed, the points were returned automatically, so net usage is 0.',
+    amount: {
+      netZero: 'Net 0',
+      zero: '0',
+      pendingFlow: '{points} pts reserved',
+      completedFlow: '{points} pts charged',
+      refundedFlow: '{points} pts deducted, then returned',
+      failedFlow: 'No charge',
+    },
     table: {
       usageType: 'Usage',
       points: 'Points',
@@ -431,10 +444,11 @@ const enUS = {
   },
   tracking: {
     brandPlaceholder: 'Select brand',
-    keywordPlaceholder: 'Select keyword',
+    keywordPlaceholder: 'Select question set',
+    allQuestionSets: 'All question sets',
     collectNow: 'Collect Now',
     collectBrandRequired: 'Select a brand before collecting.',
-    collectKeywordRequired: 'Select a keyword before collecting the current question set.',
+    collectKeywordRequired: 'Select a question set before collecting.',
     collectTodayOnly: "Collect Now only supports today's data. Switch back to today to continue.",
     collectClientChecking: "Checking whether the current account's desktop client is online.",
     collectClientOnlineRequired:
@@ -458,8 +472,9 @@ const enUS = {
     platformMatrixTitle: 'Platform Comparison Matrix',
     hotQuestions: 'Hot Questions',
     hotQuestionsTitle: 'Hot Questions',
-    hotQuestionsHint: 'Questions come from the brand library under the selected keyword.',
-    questionSearchPlaceholder: 'Search questions under the selected keyword',
+    hotQuestionsHint:
+      'Choose all question sets or one specific question. Selecting one question limits display and collection to that question.',
+    questionSearchPlaceholder: 'Search questions in the selected scope',
     questionDetailEyebrow: 'Question Detail',
     questionDetailCollectedAt: 'Collected at {time}',
     questionDetailFallback: 'Question Detail',
@@ -813,6 +828,9 @@ const enUS = {
         website: 'Official website',
         brandSummary: 'AI brand summary',
         keywords: 'Keywords',
+        brandQuestions: 'Brand questions',
+        primaryQuestion: 'Primary brand question',
+        supplementalQuestions: 'Supplemental questions',
         competitors: 'Competitors',
         chooseTitle: 'Choose a title',
         customTitle: 'Custom title',
@@ -829,11 +847,17 @@ const enUS = {
       hints: {
         brandContext: 'Optional. Selecting a brand pulls in keywords and competitor context.',
         brandFlow:
-          'You can pick a brand from the library or type one manually. AI analysis will expand keywords, competitors, and title options.',
+          'You can pick a brand from the library or type one manually. After you choose a brand question, AI will prepare the summary, competitors, and title options.',
         brandSummaryPlaceholder:
           'After analysis, AI will summarize the brand angle, positioning, and content opportunities here.',
         keywords:
           'Type keywords directly or reuse brand-library keywords. AI results will be merged into this list.',
+        brandQuestions:
+          'The primary question controls the article spine; supplemental questions broaden nearby search intent.',
+        supplementalQuestions:
+          'Choose up to 3 so the article covers related intent without drifting.',
+        questionEmpty: 'No questions are available for this brand yet.',
+        selectBrandFirst: 'Choose a brand from the library first.',
         competitors:
           'Competitors stay editable. You can add rows manually; saving to the competitor library is only available after choosing a library brand.',
         competitorEmptyEditable:
@@ -891,6 +915,8 @@ const enUS = {
         brandName: 'Enter a brand name, or refine the selected library brand',
         website: 'Official website, optional',
         keywords: 'Type keywords and press Enter',
+        primaryQuestion: 'Choose one primary brand question',
+        supplementalQuestions: 'Optional, choose up to 3 supplemental questions',
         customTitle: 'Override the AI title here if needed',
         customOutline: 'Add another section, for example “Buying advice”',
         keyPoints: 'Add any extra instructions, key angles, or constraints for the article',
@@ -904,32 +930,33 @@ const enUS = {
       aiBanner: {
         title: 'One-click AI analysis',
         defaultDescription:
-          'AI will complete the brand summary, find core keywords, and extract competitor context.',
+          'AI will use the brand question to complete the brand summary and extract competitor context.',
         productReviewDescription:
-          'AI will organize the product context, extract review keywords, and suggest comparable alternatives.',
+          'AI will use the brand question to organize the product context and suggest comparable alternatives.',
         researchReportDescription:
-          'AI will organize the topic context, extract research keywords, and suggest reference targets.',
+          'AI will use the brand question to organize the topic context and suggest reference targets.',
       },
       assist: {
-        analyzeTitle: 'AI is analyzing keywords and competitors. Please wait…',
-        analyzeTitleNoCompetitors: 'AI is analyzing keywords and context. Please wait…',
+        analyzeTitle: 'AI is analyzing brand questions and competitors. Please wait…',
+        analyzeTitleNoCompetitors: 'AI is analyzing brand questions and context. Please wait…',
         titleTitle: 'AI is generating titles. Please wait…',
         outlineTitle: 'AI is generating the article outline. Please wait…',
         analyzeStages: {
           brand: 'Analyzing the brand context…',
           keywords: 'Extracting keyword opportunities…',
+          questions: 'Organizing brand questions…',
           competitors: 'Mapping competitors and websites…',
           context: 'Organizing the content context…',
         },
         titleStages: {
           context: 'Preparing the current brief…',
-          strategy: 'Generating title directions from keywords and competitors…',
-          strategyNoCompetitors: 'Generating title directions from the keywords and brief…',
+          strategy: 'Generating title directions from brand questions and competitors…',
+          strategyNoCompetitors: 'Generating title directions from the brand question and brief…',
           finalize: 'Returning 5 title options…',
         },
         outlineStages: {
-          context: 'Preparing the title, keywords, and competitor context…',
-          contextNoCompetitors: 'Preparing the title, keywords, and content context…',
+          context: 'Preparing the title, brand questions, and competitor context…',
+          contextNoCompetitors: 'Preparing the title, brand questions, and content context…',
           structure: 'Generating the article outline from the selected structure…',
           finalize: 'Returning the editable outline result…',
         },
@@ -937,6 +964,8 @@ const enUS = {
       messages: {
         requiredField: 'Please fill in {field} first.',
         missingBrand: 'Choose a brand from the library or enter a brand name first.',
+        selectBrandBeforeQuestion: 'Choose a brand from the library before selecting a question.',
+        missingPrimaryQuestion: 'Choose one primary brand question.',
         missingTitle: 'Please choose or enter an article title.',
         missingOutline: 'Please select at least one outline section.',
         missingGeneratedOutline: 'Please generate and confirm the article outline first.',
@@ -1355,10 +1384,27 @@ const enUS = {
         coreRequired: 'Core is required',
         industryRequired: 'Industry is required',
       },
+      aiFill: {
+        button: 'AI fill',
+        success: 'Word columns filled. You can keep editing.',
+        charged: 'Word columns filled. This used {count} AI point.',
+        waitingTitle: 'AI is filling the expansion tool. Please wait...',
+        waitingStages: {
+          region: 'Detecting city, province capital, and macro region...',
+          generate: 'Analyzing brand context and high-frequency intent...',
+          refine: 'Refining short combinable keyword groups...',
+        },
+      },
       ai: {
         note: 'AI expansion consumes 1 AI point. Failed generations are refunded automatically.',
         seedTopic: 'Seed topic',
         generate: 'Generate with AI',
+        waitingTitle: 'AI is generating candidate questions. Please wait...',
+        waitingStages: {
+          context: 'Organizing brand and topic context...',
+          generate: 'Generating high-intent candidate questions...',
+          refine: 'Deduplicating and filtering savable questions...',
+        },
       },
       batch: {
         label: 'One question per line',
@@ -1370,6 +1416,7 @@ const enUS = {
       messages: {
         partialSaved: 'Saved {created}; skipped {skipped}.',
         limitReached: 'This account allows up to {limit} questions shared across all brands.',
+        selectionLimitReached: 'This plan allows up to {limit} questions. Selection limit reached.',
         truncated: 'Candidates exceeded the limit and were truncated to 500.',
         cacheHit: 'Used the most recent AI expansion result.',
         aiCharged: 'This AI expansion consumed {count} AI point.',
@@ -1378,8 +1425,6 @@ const enUS = {
         emptyInput: 'Enter question content first.',
         noSelection: 'Select at least one candidate.',
         noValidQuestions: 'No valid questions can be saved. Adjust candidates and try again.',
-        invalidCandidate:
-          'This candidate cannot be selected until it is no longer too short, duplicated, or invalid.',
       },
       page: {
         title: 'New question',