feat: integrate Career Workspace foundation from feature/career-workspace

Recover the F1 Career Profile foundation + AI-workspace persistence from the
unmerged feature/career-workspace branch, so Phase 2 builds on the documented,
tested target state instead of re-deriving it. Foundation only — CV Builder
commits (variants, ATS badge, rewrite diff) stay deferred per "do not build CV
Builder yet". See docs/career-workspace-branch-assessment.md.

Squashed from 3 branch commits (235e291, 5916f09, 00a035e), resolved against
main + Phase 0:

- CareerProfile + CareerProfileVersion (append-only history), dual-written from
  every profile save path via CareerProfileService. ApplicationUser.
  ProfileCvStructureJson stays authoritative; the tables mirror it. Stable item
  IDs assigned to jobs/education/certifications/projects (the prerequisite for
  future variant lineage). CvDateNormalizer for free-text -> YYYY-MM.
- InterviewPrepNote + AiWorkspaceNote: cache AI interview prep / candidate fit /
  focus plan keyed by an attachment-context signature, so they stop regenerating
  (and re-spending the provider) on every open.

Conflict resolutions (union, favouring current code + Phase 0):
- JobTrackerContext / StartupInitializationExtensions: kept Phase 0's tables and
  reconciler blocks, added the career/interview/ai-note tables (both SQLite and
  MySQL dialects).
- ProfileCvController: dropped the branch's in-file DTO records (main defines them
  in ProfileCvDtos.cs) and the LayoutFamily/AtsRating template fields (deferred
  ATS-badge work), keeping main's 7-arg CvTemplateDescriptor.
- JobApplicationsController: kept the branch's cache-check, restored main's
  AsNoTracking on the read-only user load.

Tables ship empty (verified dev); nothing to migrate.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

job-tracker-ui/src/components/JobDetailsDialog.tsx

@@ -1,4 +1,4 @@
-import React, { useEffect, useMemo, useState } from "react";
+import React, { useCallback, useEffect, useMemo, useState } from "react";
 
 import {
   Box,
@@ -290,6 +290,18 @@ export default function JobDetailsDialog({ open, jobId, onClose, initialTab = 0,
     }).catch(() => setCandidateFit(null)).finally(() => setLoadingCandidateFit(false));
   }, [open, jobId, tab, candidateFit, selectedAttachmentCsv, candidateFitCache]);
 
+  // Persisted server-side like interview prep (career-workspace-implementation-roadmap.md Phase
+  // F5); Regenerate is the explicit escape hatch when the job has changed since it was written.
+  const regenerateCandidateFit = useCallback(() => {
+    if (!jobId) return;
+    setLoadingCandidateFit(true);
+    api.get<CandidateFit>(`/jobapplications/${jobId}/candidate-fit`, { params: { attachmentIds: selectedAttachmentCsv || undefined, refresh: true } }).then((r) => {
+      candidateFitCache.setCached(`${jobId}:candidate-fit:${selectedAttachmentCsv || "none"}`, r.data);
+      setCandidateFit(r.data);
+      toast("Candidate fit regenerated.", "success");
+    }).catch((error: any) => toast(getApiErrorMessage(error, "Failed to regenerate candidate fit."), "error")).finally(() => setLoadingCandidateFit(false));
+  }, [jobId, selectedAttachmentCsv, candidateFitCache, toast]);
+
   // Match score is deterministic and cheap: load it on the Candidate Fit tab
   // independently of the slow AI narrative so users see the number instantly.
   useEffect(() => {
@@ -349,6 +361,16 @@ export default function JobDetailsDialog({ open, jobId, onClose, initialTab = 0,
     }).catch(() => setFocusPlan(null)).finally(() => setLoadingFocusPlan(false));
   }, [open, jobId, tab, focusPlan, selectedAttachmentCsv, focusPlanCache]);
 
+  const regenerateFocusPlan = useCallback(() => {
+    if (!jobId) return;
+    setLoadingFocusPlan(true);
+    api.get<FocusPlanResponse>(`/jobapplications/${jobId}/focus-plan`, { params: { attachmentIds: selectedAttachmentCsv || undefined, refresh: true } }).then((r) => {
+      focusPlanCache.setCached(`${jobId}:focus-plan:${selectedAttachmentCsv || "none"}`, r.data);
+      setFocusPlan(r.data);
+      toast("Focus plan regenerated.", "success");
+    }).catch((error: any) => toast(getApiErrorMessage(error, "Failed to regenerate focus plan."), "error")).finally(() => setLoadingFocusPlan(false));
+  }, [jobId, selectedAttachmentCsv, focusPlanCache, toast]);
+
   useEffect(() => {
     if (!open || !jobId || tab !== 7 || interviewPrep) return;
     const cacheKey = `${jobId}:interview-prep:${selectedAttachmentCsv || "none"}`;
@@ -365,6 +387,19 @@ export default function JobDetailsDialog({ open, jobId, onClose, initialTab = 0,
     }).catch(() => setInterviewPrep(null)).finally(() => setLoadingInterviewPrep(false));
   }, [open, jobId, tab, interviewPrep, selectedAttachmentCsv, interviewPrepCache]);
 
+  // Interview prep is now persisted server-side (career-workspace-implementation-roadmap.md
+  // Phase F5) so it survives tab switches without re-running the AI call. Regenerate is the
+  // explicit escape hatch for when the underlying job/notes have changed since it was written.
+  const regenerateInterviewPrep = useCallback(() => {
+    if (!jobId) return;
+    setLoadingInterviewPrep(true);
+    api.get<InterviewPrepResponse>(`/jobapplications/${jobId}/interview-prep`, { params: { attachmentIds: selectedAttachmentCsv || undefined, refresh: true } }).then((r) => {
+      interviewPrepCache.setCached(`${jobId}:interview-prep:${selectedAttachmentCsv || "none"}`, r.data);
+      setInterviewPrep(r.data);
+      toast("Interview prep regenerated.", "success");
+    }).catch((error: any) => toast(getApiErrorMessage(error, "Failed to regenerate interview prep."), "error")).finally(() => setLoadingInterviewPrep(false));
+  }, [jobId, selectedAttachmentCsv, interviewPrepCache, toast]);
+
   useEffect(() => {
     setFollowUpDraft(null);
     setCandidateFit(null);
@@ -1146,6 +1181,11 @@ export default function JobDetailsDialog({ open, jobId, onClose, initialTab = 0,
         {tab === 5 && (
           <Box>
             <MatchScoreCard score={matchScore} loading={loadingMatchScore} />
+            <Box sx={{ display: "flex", justifyContent: "flex-end", my: 1.5 }}>
+              <Button size="small" variant="outlined" disabled={loadingCandidateFit} onClick={regenerateCandidateFit}>
+                {loadingCandidateFit ? "Regenerating..." : "Regenerate"}
+              </Button>
+            </Box>
             {loadingCandidateFit ? <Box sx={{ py: 4, display: "flex", justifyContent: "center" }}><CircularProgress size={28} /></Box> : candidateFit ? (
               <Box sx={{ display: "flex", flexDirection: "column", gap: 2.5 }}>
                 <Typography variant="caption" sx={{ color: "text.secondary", display: "block", mt: -1 }}>{t("jobDetailsAiFitHint")}</Typography>
@@ -1174,6 +1214,11 @@ export default function JobDetailsDialog({ open, jobId, onClose, initialTab = 0,
 
         {tab === 6 && (
           <Box>
+            <Box sx={{ display: "flex", justifyContent: "flex-end", mb: 1.5 }}>
+              <Button size="small" variant="outlined" disabled={loadingFocusPlan} onClick={regenerateFocusPlan}>
+                {loadingFocusPlan ? "Regenerating..." : "Regenerate"}
+              </Button>
+            </Box>
             {loadingFocusPlan ? <Box sx={{ py: 4, display: "flex", justifyContent: "center" }}><CircularProgress size={28} /></Box> : focusPlan ? (
               <Box sx={{ display: "flex", flexDirection: "column", gap: 2 }}>
                 <DraftCard title={t("jobDetailsFocusSummary")} content={focusPlan.strategicSummary} />
@@ -1187,6 +1232,11 @@ export default function JobDetailsDialog({ open, jobId, onClose, initialTab = 0,
 
         {tab === 7 && (
           <Box>
+            <Box sx={{ display: "flex", justifyContent: "flex-end", mb: 1.5 }}>
+              <Button size="small" variant="outlined" disabled={loadingInterviewPrep} onClick={regenerateInterviewPrep}>
+                {loadingInterviewPrep ? "Regenerating..." : "Regenerate"}
+              </Button>
+            </Box>
             {loadingInterviewPrep ? <Box sx={{ py: 4, display: "flex", justifyContent: "center" }}><CircularProgress size={28} /></Box> : interviewPrep ? (
               <Box sx={{ display: "flex", flexDirection: "column", gap: 2 }}>
                 <DraftCard title={t("jobDetailsInterviewPrepBrief")} content={interviewPrep.summary} />