fix: evaluation report P0/P1/P2 fixes, remove Docker, add upload UI

Backend:
- Add NotFoundException + BusinessException, return correct HTTP status (404/400)
- Add @Index on reports.project_id and reports.upload_time
- Add fileSize column to reports, populate on upload, return in DTO
- Cascade delete: deleting project now removes all reports (DB + files + PDFs)
- Delete report: also clean up pre-rendered PDF
- File upload MIME validation (extension + Content-Type)
- Remove duplicate @ExceptionHandler from ReportController
- Switch from System.err to SLF4J logger
- Handle MethodArgumentNotValid, MissingServletRequestPart, etc.

Frontend:
- Remove all Docker files (project uses 宝塔 panel deployment)
- Upgrade axios 1.6.8 -> 1.7.7 (CVE-2024-39338)
- Remove unused @vue-office/pptx + vue-demi (see CHANGELOG for rationale)
- Fix vite proxy port 37821 -> 30081
- Remove mock data fallback in production
- Add upload report UI (button + modal in ProjectDetail)
- Add create project UI (button + modal in ProjectList)
- Add filename search box in ProjectDetail
- New useApi methods: createProject, uploadReport, deleteProject, deleteReport
- FilePreview/ReportCard: show fileSize (was undefined before)

Docs:
- Add README.md (overview, quick start, structure)
- Add CHANGELOG.md (full change log + pptx removal rationale)
- Include EVALUATION_REPORT.md and blog-vibe-coding.md

Tests:
- All 73 backend tests pass
- All 43 frontend tests pass
- Updated test fixtures for new API contract

pnpm-lock.yaml

@@ -8,11 +8,8 @@ importers:
 
   .:
     dependencies:
-      '@vue-office/pptx':
-        specifier: ^1.0.1
-        version: 1.0.1(vue-demi@0.14.10(vue@3.5.34))(vue@3.5.34)
       axios:
-        specifier: ^1.6.8
+        specifier: ^1.7.7
         version: 1.16.1
       marked:
         specifier: ^12.0.0
@@ -20,9 +17,6 @@ importers:
       vue:
         specifier: ^3.4.21
         version: 3.5.34
-      vue-demi:
-        specifier: ^0.14.6
-        version: 0.14.10(vue@3.5.34)
       vue-router:
         specifier: ^4.3.0
         version: 4.6.4(vue@3.5.34)
@@ -555,16 +549,6 @@ packages:
   '@vitest/utils@1.6.1':
     resolution: {integrity: sha512-jOrrUvXM4Av9ZWiG1EajNto0u96kWAhJ1LmPmJhXXQx/32MecEKd10pOLYgS2BQx1TgkGhloPU1ArDW2vvaY6g==}
 
-  '@vue-office/pptx@1.0.1':
-    resolution: {integrity: sha512-+V7Kctzl6f6+Yk4NaD/wQGRIkqLWcowe0jEhPexWQb8Oilbzt1OyhWRWcMsxNDTdrgm6aMLP+0/tmw27cxddMg==}
-    peerDependencies:
-      '@vue/composition-api': ^1.7.1
-      vue: ^2.0.0 || >=3.0.0
-      vue-demi: ^0.14.6
-    peerDependenciesMeta:
-      '@vue/composition-api':
-        optional: true
-
   '@vue/compiler-core@3.5.34':
     resolution: {integrity: sha512-s9cLyK5mLcvZ4Agva5QgRsQyLKvts9WbU9DB6NqiZkkGEdwmcEiylj5Jbwkp680drF/NNCV8OlAJSe+yMLxaJw==}
 
@@ -1386,17 +1370,6 @@ packages:
   vue-component-type-helpers@3.3.1:
     resolution: {integrity: sha512-pu58kqxmVyEH6VfNYW1UyEfR3XAnJ27ZXT3yzXxxpjLxVzAbyC35Zk/nm/RMs7ijWnJNSd9fWkeex2OhUsx3MA==}
 
-  vue-demi@0.14.10:
-    resolution: {integrity: sha512-nMZBOwuzabUO0nLgIcc6rycZEebF6eeUfaiQx9+WSk8e29IbLvPU9feI6tqW4kTo3hvoYAJkMh8n8D0fuISphg==}
-    engines: {node: '>=12'}
-    hasBin: true
-    peerDependencies:
-      '@vue/composition-api': ^1.0.0-rc.1
-      vue: ^3.0.0-0 || ^2.6.0
-    peerDependenciesMeta:
-      '@vue/composition-api':
-        optional: true
-
   vue-router@4.6.4:
     resolution: {integrity: sha512-Hz9q5sa33Yhduglwz6g9skT8OBPii+4bFn88w6J+J4MfEo4KRRpmiNG/hHHkdbRFlLBOqxN8y8gf2Fb0MTUgVg==}
     peerDependencies:
@@ -1818,11 +1791,6 @@ snapshots:
       loupe: 2.3.7
       pretty-format: 29.7.0
 
-  '@vue-office/pptx@1.0.1(vue-demi@0.14.10(vue@3.5.34))(vue@3.5.34)':
-    dependencies:
-      vue: 3.5.34
-      vue-demi: 0.14.10(vue@3.5.34)
-
   '@vue/compiler-core@3.5.34':
     dependencies:
       '@babel/parser': 7.29.3
@@ -2651,10 +2619,6 @@ snapshots:
 
   vue-component-type-helpers@3.3.1: {}
 
-  vue-demi@0.14.10(vue@3.5.34):
-    dependencies:
-      vue: 3.5.34
-
   vue-router@4.6.4(vue@3.5.34):
     dependencies:
       '@vue/devtools-api': 6.6.4